diff --git a/README.md b/README.md
index b204405..bad872d 100644
--- a/README.md
+++ b/README.md
@@ -16,16 +16,16 @@ To compute intermediate state, transitions leverage a variety of [built-in inter
 
 ## Installing
 
-If you use NPM, `npm install d3-transition`. Otherwise, download the [latest release](https://github.com/d3/d3-transition/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-transition.v1.min.js) or as part of [D3](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
+If you use NPM, `npm install d3-transition`. Otherwise, download the [latest release](https://github.com/d3/d3-transition/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-transition.v2.min.js) or as part of [D3](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
 
 ```html
-<script src="https://d3js.org/d3-color.v1.min.js"></script>
-<script src="https://d3js.org/d3-dispatch.v1.min.js"></script>
-<script src="https://d3js.org/d3-ease.v1.min.js"></script>
-<script src="https://d3js.org/d3-interpolate.v1.min.js"></script>
-<script src="https://d3js.org/d3-selection.v1.min.js"></script>
-<script src="https://d3js.org/d3-timer.v1.min.js"></script>
-<script src="https://d3js.org/d3-transition.v1.min.js"></script>
+<script src="https://d3js.org/d3-color.v2.min.js"></script>
+<script src="https://d3js.org/d3-dispatch.v2.min.js"></script>
+<script src="https://d3js.org/d3-ease.v2.min.js"></script>
+<script src="https://d3js.org/d3-interpolate.v2.min.js"></script>
+<script src="https://d3js.org/d3-selection.v2.min.js"></script>
+<script src="https://d3js.org/d3-timer.v2.min.js"></script>
+<script src="https://d3js.org/d3-transition.v2.min.js"></script>
 <script>
 
 var transition = d3.transition();
@@ -47,7 +47,7 @@ var transition = d3.transition();
 
 Transitions are derived from [selections](https://github.com/d3/d3-selection) via [*selection*.transition](#selection_transition). You can also create a transition on the document root element using [d3.transition](#transition).
 
-<a name="selection_transition" href="#selection_transition">#</a> <i>selection</i>.<b>transition</b>([<i>name</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/selection/transition.js "Source")
+<a name="selection_transition" href="#selection_transition">#</a> <i>selection</i>.<b>transition</b>([<i>name</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/selection/transition.js)
 
 Returns a new transition on the given *selection* with the specified *name*. If a *name* is not specified, null is used. The new transition is only exclusive with other transitions of the same name.
 
@@ -67,7 +67,7 @@ d3.selectAll(".orange").transition(t)
 
 If the specified *transition* is not found on a selected node or its ancestors (such as if the transition [already ended](#the-life-of-a-transition)), the default timing parameters are used; however, in a future release, this will likely be changed to throw an error. See [#59](https://github.com/d3/d3-transition/issues/59).
 
-<a name="selection_interrupt" href="#selection_interrupt">#</a> <i>selection</i>.<b>interrupt</b>([<i>name</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/selection/interrupt.js "Source")
+<a name="selection_interrupt" href="#selection_interrupt">#</a> <i>selection</i>.<b>interrupt</b>([<i>name</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/selection/interrupt.js)
 
 Interrupts the active transition of the specified *name* on the selected elements, and cancels any pending transitions with the specified *name*, if any. If a name is not specified, null is used.
 
@@ -83,11 +83,11 @@ The [universal selector](https://developer.mozilla.org/en-US/docs/Web/CSS/Univer
 selection.interrupt().selectAll("*").interrupt();
 ```
 
-<a name="interrupt" href="#interrupt">#</a> d3.<b>interrupt</b>(<i>node</i>[, <i>name</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/interrupt.js "Source")
+<a name="interrupt" href="#interrupt">#</a> d3.<b>interrupt</b>(<i>node</i>[, <i>name</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/interrupt.js)
 
 Interrupts the active transition of the specified *name* on the specified *node*, and cancels any pending transitions with the specified *name*, if any. If a name is not specified, null is used. See also [*selection*.interrupt](#selection_interrupt).
 
-<a name="transition" href="#transition">#</a> d3.<b>transition</b>([<i>name</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/index.js#L29 "Source")
+<a name="transition" href="#transition">#</a> d3.<b>transition</b>([<i>name</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/index.js#L29)
 
 Returns a new transition on the root element, `document.documentElement`, with the specified *name*. If a *name* is not specified, null is used. The new transition is only exclusive with other transitions of the same name. The *name* may also be a [transition](#transition) instance; see [*selection*.transition](#selection_transition). This method is equivalent to:
 
@@ -98,9 +98,9 @@ d3.selection()
 
 This function can also be used to test for transitions (`instanceof d3.transition`) or to extend the transition prototype.
 
-<a name="transition_select" href="#transition_select">#</a> <i>transition</i>.<b>select</b>(<i>selector</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/select.js "Source")
+<a name="transition_select" href="#transition_select">#</a> <i>transition</i>.<b>select</b>(<i>selector</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/select.js)
 
-For each selected element, selects the first descendant element that matches the specified *selector* string, if any, and returns a transition on the resulting selection. The *selector* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
+For each selected element, selects the first descendant element that matches the specified *selector* string, if any, and returns a transition on the resulting selection. The *selector* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
 
 This method is equivalent to deriving the selection for this transition via [*transition*.selection](#transition_selection), creating a subselection via [*selection*.select](https://github.com/d3/d3-selection#selection_select), and then creating a new transition via [*selection*.transition](#selection_transition):
 
@@ -111,9 +111,9 @@ transition
   .transition(transition)
 ```
 
-<a name="transition_selectAll" href="#transition_selectAll">#</a> <i>transition</i>.<b>selectAll</b>(<i>selector</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/selectAll.js "Source")
+<a name="transition_selectAll" href="#transition_selectAll">#</a> <i>transition</i>.<b>selectAll</b>(<i>selector</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/selectAll.js)
 
-For each selected element, selects all descendant elements that match the specified *selector* string, if any, and returns a transition on the resulting selection. The *selector* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
+For each selected element, selects all descendant elements that match the specified *selector* string, if any, and returns a transition on the resulting selection. The *selector* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
 
 This method is equivalent to deriving the selection for this transition via [*transition*.selection](#transition_selection), creating a subselection via [*selection*.selectAll](https://github.com/d3/d3-selection#selection_selectAll), and then creating a new transition via [*selection*.transition](#selection_transition):
 
@@ -124,9 +124,9 @@ transition
   .transition(transition)
 ```
 
-<a name="transition_filter" href="#transition_filter">#</a> <i>transition</i>.<b>filter</b>(<i>filter</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/filter.js "Source")
+<a name="transition_filter" href="#transition_filter">#</a> <i>transition</i>.<b>filter</b>(<i>filter</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/filter.js)
 
-For each selected element, selects only the elements that match the specified *filter*, and returns a transition on the resulting selection. The *filter* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
+For each selected element, selects only the elements that match the specified *filter*, and returns a transition on the resulting selection. The *filter* may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The new transition has the same id, name and timing as this transition; however, if a transition with the same id already exists on a selected element, the existing transition is returned for that element.
 
 This method is equivalent to deriving the selection for this transition via [*transition*.selection](#transition_selection), creating a subselection via [*selection*.filter](https://github.com/d3/d3-selection#selection_filter), and then creating a new transition via [*selection*.transition](#selection_transition):
 
@@ -137,7 +137,7 @@ transition
   .transition(transition)
 ```
 
-<a name="transition_merge" href="#transition_merge">#</a> <i>transition</i>.<b>merge</b>(<i>other</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/merge.js "Source")
+<a name="transition_merge" href="#transition_merge">#</a> <i>transition</i>.<b>merge</b>(<i>other</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/merge.js)
 
 Returns a new transition merging this transition with the specified *other* transition, which must have the same id as this transition. The returned transition has the same number of groups, the same parents, the same name and the same id as this transition. Any missing (null) elements in this transition are filled with the corresponding element, if present (not null), from the *other* transition.
 
@@ -150,7 +150,7 @@ transition
   .transition(transition)
 ```
 
-<a name="transition_transition" href="#transition_transition">#</a> <i>transition</i>.<b>transition</b>() [<>](https://github.com/d3/d3-transition/blob/master/src/transition/transition.js "Source")
+<a name="transition_transition" href="#transition_transition">#</a> <i>transition</i>.<b>transition</b>() · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/transition.js)
 
 Returns a new transition on the same selected elements as this transition, scheduled to start when this transition ends. The new transition inherits a reference time equal to this transition’s time plus its [delay](#transition_delay) and [duration](#transition_duration). The new transition also inherits this transition’s name, duration, and [easing](#transition_ease). This method can be used to schedule a sequence of chained transitions. For example:
 
@@ -168,11 +168,11 @@ d3.selectAll(".apple")
 
 The delay for each transition is relative to its previous transition. Thus, in the above example, apples will stay red for one second before the last transition to brown starts.
 
-<a name="transition_selection" href="#transition_selection">#</a> <i>transition</i>.<b>selection</b>() [<>](https://github.com/d3/d3-transition/blob/master/src/transition/selection.js "Source")
+<a name="transition_selection" href="#transition_selection">#</a> <i>transition</i>.<b>selection</b>() · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/selection.js)
 
 Returns the [selection](https://github.com/d3/d3-selection#selection) corresponding to this transition.
 
-<a name="active" href="#active">#</a> d3.<b>active</b>(<i>node</i>[, <i>name</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/active.js "Source")
+<a name="active" href="#active">#</a> d3.<b>active</b>(<i>node</i>[, <i>name</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/active.js)
 
 Returns the active transition on the specified *node* with the specified *name*, if any. If no *name* is specified, null is used. Returns null if there is no such active transition on the specified node. This method is useful for creating chained transitions. For example, to initiate disco mode:
 
@@ -191,15 +191,15 @@ d3.selectAll("circle").transition()
       });
 ```
 
-See [chained transitions](http://bl.ocks.org/mbostock/70d5541b547cc222aa02) for an example.
+See [chained transitions](https://bl.ocks.org/mbostock/70d5541b547cc222aa02) for an example.
 
 ### Modifying Elements
 
 After selecting elements and creating a transition with [*selection*.transition](#selection_transition), use the transition’s transformation methods to affect document content.
 
-<a name="transition_attr" href="#transition_attr">#</a> <i>transition</i>.<b>attr</b>(<i>name</i>, <i>value</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/attr.js "Source")
+<a name="transition_attr" href="#transition_attr">#</a> <i>transition</i>.<b>attr</b>(<i>name</i>, <i>value</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/attr.js)
 
-For each selected element, assigns the [attribute tween](#transition_attrTween) for the attribute with the specified *name* to the specified target *value*. The starting value of the tween is the attribute’s value when the transition starts. The target *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element.
+For each selected element, assigns the [attribute tween](#transition_attrTween) for the attribute with the specified *name* to the specified target *value*. The starting value of the tween is the attribute’s value when the transition starts. The target *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element.
 
 If the target value is null, the attribute is removed when the transition starts. Otherwise, an interpolator is chosen based on the type of the target value, using the following algorithm:
 
@@ -209,9 +209,9 @@ If the target value is null, the attribute is removed when the transition starts
 
 To apply a different interpolator, use [*transition*.attrTween](#transition_attrTween).
 
-<a name="transition_attrTween" href="#transition_attrTween">#</a> <i>transition</i>.<b>attrTween</b>(<i>name</i>[, <i>factory</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/attrTween.js "Source")
+<a name="transition_attrTween" href="#transition_attrTween">#</a> <i>transition</i>.<b>attrTween</b>(<i>name</i>[, <i>factory</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/attrTween.js)
 
-If *factory* is specified and not null, assigns the attribute [tween](#transition_tween) for the attribute with the specified *name* to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the attribute value. The interpolator must return a string. (To remove an attribute at the start of a transition, use [*transition*.attr](#transition_attr); to remove an attribute at the end of a transition, use [*transition*.on](#transition_on) to listen for the *end* event.)
+If *factory* is specified and not null, assigns the attribute [tween](#transition_tween) for the attribute with the specified *name* to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the attribute value. The interpolator must return a string. (To remove an attribute at the start of a transition, use [*transition*.attr](#transition_attr); to remove an attribute at the end of a transition, use [*transition*.on](#transition_on) to listen for the *end* event.)
 
 If the specified *factory* is null, removes the previously-assigned attribute tween of the specified *name*, if any. If *factory* is not specified, returns the current interpolator factory for attribute with the specified *name*, or undefined if no such tween exists.
 
@@ -241,11 +241,11 @@ transition.attrTween("fill", function() {
 });
 ```
 
-This method is useful to specify a custom interpolator, such as one that understands [SVG paths](http://bl.ocks.org/mbostock/3916621). A useful technique is *data interpolation*, where [d3.interpolateObject](https://github.com/d3/d3-interpolate#interpolateObject) is used to interpolate two data values, and the resulting value is then used (say, with a [shape](https://github.com/d3/d3-shape)) to compute the new attribute value.
+This method is useful to specify a custom interpolator, such as one that understands [SVG paths](https://bl.ocks.org/mbostock/3916621). A useful technique is *data interpolation*, where [d3.interpolateObject](https://github.com/d3/d3-interpolate#interpolateObject) is used to interpolate two data values, and the resulting value is then used (say, with a [shape](https://github.com/d3/d3-shape)) to compute the new attribute value.
 
-<a name="transition_style" href="#transition_style">#</a> <i>transition</i>.<b>style</b>(<i>name</i>, <i>value</i>[, <i>priority</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/style.js "Source")
+<a name="transition_style" href="#transition_style">#</a> <i>transition</i>.<b>style</b>(<i>name</i>, <i>value</i>[, <i>priority</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/style.js)
 
-For each selected element, assigns the [style tween](#transition_styleTween) for the style with the specified *name* to the specified target *value* with the specified *priority*. The starting value of the tween is the style’s inline value if present, and otherwise its computed value, when the transition starts. The target *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element.
+For each selected element, assigns the [style tween](#transition_styleTween) for the style with the specified *name* to the specified target *value* with the specified *priority*. The starting value of the tween is the style’s inline value if present, and otherwise its computed value, when the transition starts. The target *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element.
 
 If the target value is null, the style is removed when the transition starts. Otherwise, an interpolator is chosen based on the type of the target value, using the following algorithm:
 
@@ -255,9 +255,9 @@ If the target value is null, the style is removed when the transition starts. Ot
 
 To apply a different interpolator, use [*transition*.styleTween](#transition_styleTween).
 
-<a name="transition_styleTween" href="#transition_styleTween">#</a> <i>transition</i>.<b>styleTween</b>(<i>name</i>[, <i>factory</i>[, <i>priority</i>]])) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/styleTween.js "Source")
+<a name="transition_styleTween" href="#transition_styleTween">#</a> <i>transition</i>.<b>styleTween</b>(<i>name</i>[, <i>factory</i>[, <i>priority</i>]])) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/styleTween.js)
 
-If *factory* is specified and not null, assigns the style [tween](#transition_tween) for the style with the specified *name* to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the style value with the specified *priority*. The interpolator must return a string. (To remove an style at the start of a transition, use [*transition*.style](#transition_style); to remove an style at the end of a transition, use [*transition*.on](#transition_on) to listen for the *end* event.)
+If *factory* is specified and not null, assigns the style [tween](#transition_tween) for the style with the specified *name* to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the style value with the specified *priority*. The interpolator must return a string. (To remove an style at the start of a transition, use [*transition*.style](#transition_style); to remove an style at the end of a transition, use [*transition*.on](#transition_on) to listen for the *end* event.)
 
 If the specified *factory* is null, removes the previously-assigned style tween of the specified *name*, if any. If *factory* is not specified, returns the current interpolator factory for style with the specified *name*, or undefined if no such tween exists.
 
@@ -289,14 +289,14 @@ transition.styleTween("fill", function() {
 
 This method is useful to specify a custom interpolator, such as with *data interpolation*, where [d3.interpolateObject](https://github.com/d3/d3-interpolate#interpolateObject) is used to interpolate two data values, and the resulting value is then used to compute the new style value.
 
-<a name="transition_text" href="#transition_text">#</a> <i>transition</i>.<b>text</b>(<i>value</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/text.js "Source")
+<a name="transition_text" href="#transition_text">#</a> <i>transition</i>.<b>text</b>(<i>value</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/text.js)
 
-For each selected element, sets the [text content](http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-textContent) to the specified target *value* when the transition starts. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The function’s return value is then used to set each element’s text content. A null value will clear the content.
+For each selected element, sets the [text content](http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-textContent) to the specified target *value* when the transition starts. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The function’s return value is then used to set each element’s text content. A null value will clear the content.
 
-To interpolate text rather than to set it on start, use [*transition*.textTween](#transition_textTween) ([for example](http://bl.ocks.org/mbostock/7004f92cac972edef365)) or append a replacement element and cross-fade opacity ([for example](http://bl.ocks.org/mbostock/f7dcecb19c4af317e464)). Text is not interpolated by default because it is usually undesirable.
-
-<a name="transition_textTween" href="#transition_textTween">#</a> <i>transition</i>.<b>textTween</b>(<i>factory</i>) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/textTween.js "Source")
+To interpolate text rather than to set it on start, use [*transition*.textTween](#transition_textTween) or append a replacement element and cross-fade opacity. Text is not interpolated by default because it is usually undesirable.
 
+<a name="transition_textTween" href="#transition_textTween">#</a> <i>transition</i>.<b>textTween</b>(<i>factory</i>) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/textTween.js), [Examples](https://observablehq.com/@d3/transition-texttween)
+ 
 If *factory* is specified and not null, assigns the text [tween](#transition_tween) to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the text. The interpolator must return a string.
 
 For example, to interpolate the text with integers from 0 to 100:
@@ -309,13 +309,13 @@ transition.textTween(function() {
 
 If the specified *factory* is null, removes the previously-assigned text tween, if any. If *factory* is not specified, returns the current interpolator factory for text, or undefined if no such tween exists.
 
-<a name="transition_remove" href="#transition_remove">#</a> <i>transition</i>.<b>remove</b>() [<>](https://github.com/d3/d3-transition/blob/master/src/transition/remove.js "Source")
+<a name="transition_remove" href="#transition_remove">#</a> <i>transition</i>.<b>remove</b>() · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/remove.js)
 
 For each selected element, [removes](https://github.com/d3/d3-selection#selection_remove) the element when the transition ends, as long as the element has no other active or pending transitions. If the element has other active or pending transitions, does nothing.
 
-<a name="transition_tween" href="#transition_tween">#</a> <i>transition</i>.<b>tween</b>(<i>name</i>[, <i>value</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/tween.js "Source")
+<a name="transition_tween" href="#transition_tween">#</a> <i>transition</i>.<b>tween</b>(<i>name</i>[, <i>value</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/tween.js)
 
-For each selected element, assigns the tween with the specified *name* with the specified *value* function. The *value* must be specified as a function that returns a function. When the transition starts, the *value* function is evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned function is then invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. If the specified *value* is null, removes the previously-assigned tween of the specified *name*, if any.
+For each selected element, assigns the tween with the specified *name* with the specified *value* function. The *value* must be specified as a function that returns a function. When the transition starts, the *value* function is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The returned function is then invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. If the specified *value* is null, removes the previously-assigned tween of the specified *name*, if any.
 
 For example, to interpolate the fill attribute to blue, like [*transition*.attr](#transition_attr):
 
@@ -328,15 +328,15 @@ transition.tween("attr.fill", function() {
 });
 ```
 
-This method is useful to specify a custom interpolator, or to perform side-effects, say to animate the [scroll offset](http://bl.ocks.org/mbostock/1649463).
+This method is useful to specify a custom interpolator, or to perform side-effects, say to animate the [scroll offset](https://bl.ocks.org/mbostock/1649463).
 
 ### Timing
 
-The [easing](#transition_ease), [delay](#transition_delay) and [duration](#transition_duration) of a transition is configurable. For example, a per-element delay can be used to [stagger the reordering](http://bl.ocks.org/mbostock/3885705) of elements, improving perception. See [Animated Transitions in Statistical Data Graphics](http://vis.berkeley.edu/papers/animated_transitions/) for recommendations.
+The [easing](#transition_ease), [delay](#transition_delay) and [duration](#transition_duration) of a transition is configurable. For example, a per-element delay can be used to [stagger the reordering](https://observablehq.com/@d3/sortable-bar-chart) of elements, improving perception. See [Animated Transitions in Statistical Data Graphics](http://vis.berkeley.edu/papers/animated_transitions/) for recommendations.
 
-<a name="transition_delay" href="#transition_delay">#</a> <i>transition</i>.<b>delay</b>([<i>value</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/delay.js "Source")
+<a name="transition_delay" href="#transition_delay">#</a> <i>transition</i>.<b>delay</b>([<i>value</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/delay.js)
 
-For each selected element, sets the transition delay to the specified *value* in milliseconds. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The function’s return value is then used to set each element’s transition delay. If a delay is not specified, it defaults to zero.
+For each selected element, sets the transition delay to the specified *value* in milliseconds. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The function’s return value is then used to set each element’s transition delay. If a delay is not specified, it defaults to zero.
 
 If a *value* is not specified, returns the current value of the delay for the first (non-null) element in the transition. This is generally useful only if you know that the transition contains exactly one element.
 
@@ -348,13 +348,13 @@ transition.delay(function(d, i) { return i * 10; });
 
 Of course, you can also compute the delay as a function of the data, or [sort the selection](https://github.com/d3/d3-selection#selection_sort) before computed an index-based delay.
 
-<a name="transition_duration" href="#transition_duration">#</a> <i>transition</i>.<b>duration</b>([<i>value</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/duration.js "Source")
+<a name="transition_duration" href="#transition_duration">#</a> <i>transition</i>.<b>duration</b>([<i>value</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/duration.js)
 
-For each selected element, sets the transition duration to the specified *value* in milliseconds. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The function’s return value is then used to set each element’s transition duration. If a duration is not specified, it defaults to 250ms.
+For each selected element, sets the transition duration to the specified *value* in milliseconds. The *value* may be specified either as a constant or a function. If a function, it is immediately evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The function’s return value is then used to set each element’s transition duration. If a duration is not specified, it defaults to 250ms.
 
 If a *value* is not specified, returns the current value of the duration for the first (non-null) element in the transition. This is generally useful only if you know that the transition contains exactly one element.
 
-<a name="transition_ease" href="#transition_ease">#</a> <i>transition</i>.<b>ease</b>([<i>value</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/ease.js "Source")
+<a name="transition_ease" href="#transition_ease">#</a> <i>transition</i>.<b>ease</b>([<i>value</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/ease.js)
 
 Specifies the transition [easing function](https://github.com/d3/d3-ease) for all selected elements. The *value* must be specified as a function. The easing function is invoked for each frame of the animation, being passed the normalized time *t* in the range [0, 1]; it must then return the eased time *tʹ* which is typically also in the range [0, 1]. A good easing function should return 0 if *t* = 0 and 1 if *t* = 1. If an easing function is not specified, it defaults to [d3.easeCubic](https://github.com/d3/d3-ease#easeCubic).
 
@@ -368,11 +368,11 @@ Specifies a factory for the transition [easing function](https://github.com/d3/d
 
 For advanced usage, transitions provide methods for custom control flow.
 
-<a name="transition_end" href="#transition_end">#</a> <i>transition</i>.<b>end</b>() [<>](https://github.com/d3/d3-transition/blob/master/src/transition/end.js "Source")
+<a name="transition_end" href="#transition_end">#</a> <i>transition</i>.<b>end</b>() · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/end.js)
 
 Returns a promise that resolves when every selected element finishes transitioning. If any element’s transition is cancelled or interrupted, the promise rejects.
 
-<a name="transition_on" href="#transition_on">#</a> <i>transition</i>.<b>on</b>(<i>typenames</i>[, <i>listener</i>]) [<>](https://github.com/d3/d3-transition/blob/master/src/transition/on.js "Source")
+<a name="transition_on" href="#transition_on">#</a> <i>transition</i>.<b>on</b>(<i>typenames</i>[, <i>listener</i>]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/on.js)
 
 Adds or removes a *listener* to each selected element for the specified event *typenames*. The *typenames* is one of the following string event types:
 
@@ -385,17 +385,17 @@ See [The Life of a Transition](#the-life-of-a-transition) for more. Note that th
 
 The type may be optionally followed by a period (`.`) and a name; the optional name allows multiple callbacks to be registered to receive events of the same type, such as `start.foo` and `start.bar`. To specify multiple typenames, separate typenames with spaces, such as `interrupt end` or `start.foo start.bar`.
 
-When a specified transition event is dispatched on a selected node, the specified *listener* will be invoked for the transitioning element, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. Listeners always see the latest datum for their element, but the index is a property of the selection and is fixed when the listener is assigned; to update the index, re-assign the listener.
+When a specified transition event is dispatched on a selected node, the specified *listener* will be invoked for the transitioning element, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. Listeners always see the latest datum for their element, but the index is a property of the selection and is fixed when the listener is assigned; to update the index, re-assign the listener.
 
 If an event listener was previously registered for the same *typename* on a selected element, the old listener is removed before the new listener is added. To remove a listener, pass null as the *listener*. To remove all listeners for a given name, pass null as the *listener* and `.foo` as the *typename*, where `foo` is the name; to remove all listeners with no name, specify `.` as the *typename*.
 
 If a *listener* is not specified, returns the currently-assigned listener for the specified event *typename* on the first (non-null) selected element, if any. If multiple typenames are specified, the first matching listener is returned.
 
-<a name="transition_each" href="#transition_each">#</a> <i>transition</i>.<b>each</b>(<i>function</i>) [<>](https://github.com/d3/d3-selection/blob/master/src/selection/each.js "Source")
+<a name="transition_each" href="#transition_each">#</a> <i>transition</i>.<b>each</b>(<i>function</i>) · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/each.js)
 
-Invokes the specified *function* for each selected element, passing in the current datum `d` and index `i`, with the `this` context of the current DOM element. This method can be used to invoke arbitrary code for each selected element, and is useful for creating a context to access parent and child data simultaneously. Equivalent to [*selection*.each](https://github.com/d3/d3-selection#selection_each).
+Invokes the specified *function* for each selected element, passing in the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. This method can be used to invoke arbitrary code for each selected element, and is useful for creating a context to access parent and child data simultaneously. Equivalent to [*selection*.each](https://github.com/d3/d3-selection#selection_each).
 
-<a name="transition_call" href="#transition_call">#</a> <i>transition</i>.<b>call</b>(<i>function</i>[, <i>arguments…</i>]) [<>](https://github.com/d3/d3-selection/blob/master/src/selection/call.js "Source")
+<a name="transition_call" href="#transition_call">#</a> <i>transition</i>.<b>call</b>(<i>function</i>[, <i>arguments…</i>]) · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/call.js)
 
 Invokes the specified *function* exactly once, passing in this transition along with any optional *arguments*. Returns this transition. This is equivalent to invoking the function by hand but facilitates method chaining. For example, to set several attributes in a reusable function:
 
@@ -421,19 +421,19 @@ color(d3.selectAll("div").transition(), "red", "blue");
 
 Equivalent to [*selection*.call](https://github.com/d3/d3-selection#selection_call).
 
-<a name="transition_empty" href="#transition_empty">#</a> <i>transition</i>.<b>empty</b>() [<>](https://github.com/d3/d3-selection/blob/master/src/selection/empty.js "Source")
+<a name="transition_empty" href="#transition_empty">#</a> <i>transition</i>.<b>empty</b>() · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/empty.js)
 
 Returns true if this transition contains no (non-null) elements. Equivalent to [*selection*.empty](https://github.com/d3/d3-selection#selection_empty).
 
-<a name="transition_nodes" href="#transition_nodes">#</a> <i>transition</i>.<b>nodes</b>() [<>](https://github.com/d3/d3-selection/blob/master/src/selection/nodes.js "Source")
+<a name="transition_nodes" href="#transition_nodes">#</a> <i>transition</i>.<b>nodes</b>() · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/nodes.js)
 
 Returns an array of all (non-null) elements in this transition. Equivalent to [*selection*.nodes](https://github.com/d3/d3-selection#selection_nodes).
 
-<a name="transition_node" href="#transition_node">#</a> <i>transition</i>.<b>node</b>() [<>](https://github.com/d3/d3-selection/blob/master/src/selection/node.js "Source")
+<a name="transition_node" href="#transition_node">#</a> <i>transition</i>.<b>node</b>() · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/node.js)
 
 Returns the first (non-null) element in this transition. If the transition is empty, returns null. Equivalent to [*selection*.node](https://github.com/d3/d3-selection#selection_node).
 
-<a name="transition_size" href="#transition_size">#</a> <i>transition</i>.<b>size</b>() [<>](https://github.com/d3/d3-selection/blob/master/src/selection/size.js "Source")
+<a name="transition_size" href="#transition_size">#</a> <i>transition</i>.<b>size</b>() · [Source](https://github.com/d3/d3-selection/blob/master/src/selection/size.js)
 
 Returns the total number of elements in this transition. Equivalent to [*selection*.size](https://github.com/d3/d3-selection#selection_size).
 
diff --git a/package.json b/package.json
index 753b0a9..8e30b5a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,9 @@
 {
   "name": "d3-transition",
-  "version": "1.3.2",
+  "version": "2.0.0-rc.6",
+  "publishConfig": {
+    "tag": "next"
+  },
   "description": "Animated transitions for D3 selections.",
   "keywords": [
     "d3",
@@ -35,14 +38,17 @@
   },
   "sideEffects": true,
   "dependencies": {
-    "d3-color": "1",
-    "d3-dispatch": "1",
-    "d3-ease": "1",
-    "d3-interpolate": "1",
-    "d3-selection": "^1.1.0",
-    "d3-timer": "1"
+    "d3-color": ">=2.0.0-rc.1",
+    "d3-dispatch": ">=2.0.0-rc.1",
+    "d3-ease": ">=2.0.0-rc.1",
+    "d3-interpolate": ">=2.0.0-rc.1",
+    "d3-timer": ">=2.0.0-rc.1"
+  },
+  "peerDependencies": {
+    "d3-selection": "2.0.0-rc.4"
   },
   "devDependencies": {
+    "d3-selection": ">=2.0.0-rc.1",
     "eslint": "6",
     "jsdom": "15",
     "rollup": "1",
diff --git a/rollup.config.js b/rollup.config.js
index 3092950..65d24af 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -11,7 +11,7 @@ const config = {
     indent: false,
     extend: true,
     banner: `// ${meta.homepage} v${meta.version} Copyright ${(new Date).getFullYear()} ${meta.author.name}`,
-    globals: Object.assign({}, ...Object.keys(meta.dependencies || {}).filter(key => /^d3-/.test(key)).map(key => ({[key]: "d3"})))
+    globals: Object.assign({}, ...Object.keys({...meta.dependencies, ...meta.peerDependencies}).filter(key => /^d3-/.test(key)).map(key => ({[key]: "d3"})))
   },
   plugins: [],
   onwarn(message, warn) {
diff --git a/src/selection/transition.js b/src/selection/transition.js
index 4cdc6ba..a328dcb 100644
--- a/src/selection/transition.js
+++ b/src/selection/transition.js
@@ -14,7 +14,7 @@ function inherit(node, id) {
   var timing;
   while (!(timing = node.__transition) || !(timing = timing[id])) {
     if (!(node = node.parentNode)) {
-      return defaultTiming.time = now(), defaultTiming;
+      throw new Error(`transition ${id} not found`);
     }
   }
   return timing;
diff --git a/src/transition/end.js b/src/transition/end.js
index 252ce86..d9aa373 100644
--- a/src/transition/end.js
+++ b/src/transition/end.js
@@ -22,5 +22,8 @@ export default function() {
 
       schedule.on = on1;
     });
+
+    // The selection was empty, resolve end immediately
+    if (size === 0) resolve();
   });
 }
diff --git a/src/transition/index.js b/src/transition/index.js
index 0557e43..355be71 100644
--- a/src/transition/index.js
+++ b/src/transition/index.js
@@ -66,5 +66,6 @@ Transition.prototype = transition.prototype = {
   duration: transition_duration,
   ease: transition_ease,
   easeVarying: transition_easeVarying,
-  end: transition_end
+  end: transition_end,
+  [Symbol.iterator]: selection_prototype[Symbol.iterator]
 };
diff --git a/test/selection/transition-test.js b/test/selection/transition-test.js
index 4bd11d4..53b8693 100644
--- a/test/selection/transition-test.js
+++ b/test/selection/transition-test.js
@@ -129,3 +129,24 @@ tape("selection.transition(transition) reselects the existing transition with th
   test.equal(transition2.tween("tween"), bar);
   test.end();
 });
+
+tape("selection.transition(transition) throws an error if the specified transition is not found", function(test) {
+  var document = jsdom("<h1 id='one'></h1><h1 id='two'></h1>"),
+      one = document.querySelector("#one"),
+      two = document.querySelector("#two"),
+      transition1 = d3_selection.select(one).transition(),
+      transition2 = d3_selection.select(two).transition().delay(50);
+  try {
+    d3_selection.select(two).transition(transition1);
+    test.fail();
+  } catch (error) {
+    test.deepEqual(error.message, `transition ${transition1._id} not found`);
+  }
+  try {
+    d3_selection.select(one).transition(transition2);
+    test.fail();
+  } catch (error) {
+    test.deepEqual(error.message, `transition ${transition2._id} not found`);
+  }
+  test.end();
+});
diff --git a/test/transition/delay-test.js b/test/transition/delay-test.js
index 46e641b..30a271f 100644
--- a/test/transition/delay-test.js
+++ b/test/transition/delay-test.js
@@ -18,8 +18,6 @@ tape("transition.delay() returns the delay for the first non-null node", functio
   test.strictEqual(d3_selection.select(two).transition(transition2).delay(), 50);
   test.strictEqual(d3_selection.selectAll([null, one]).transition(transition1).delay(), 0);
   test.strictEqual(d3_selection.selectAll([null, two]).transition(transition2).delay(), 50);
-  test.strictEqual(d3_selection.selectAll([one, two]).transition(transition1).delay(), 0);
-  test.strictEqual(d3_selection.selectAll([two, one]).transition(transition2).delay(), 50);
   test.end();
 });
 
diff --git a/test/transition/duration-test.js b/test/transition/duration-test.js
index 8a844b9..4fd170d 100644
--- a/test/transition/duration-test.js
+++ b/test/transition/duration-test.js
@@ -18,8 +18,6 @@ tape("transition.duration() returns the duration for the first non-null node", f
   test.strictEqual(d3_selection.select(two).transition(transition2).duration(), 50);
   test.strictEqual(d3_selection.selectAll([null, one]).transition(transition1).duration(), 250);
   test.strictEqual(d3_selection.selectAll([null, two]).transition(transition2).duration(), 50);
-  test.strictEqual(d3_selection.selectAll([one, two]).transition(transition1).duration(), 250);
-  test.strictEqual(d3_selection.selectAll([two, one]).transition(transition2).duration(), 50);
   test.end();
 });
 
diff --git a/test/transition/each-test.js b/test/transition/each-test.js
index e8ba5ad..5e6b5c7 100644
--- a/test/transition/each-test.js
+++ b/test/transition/each-test.js
@@ -1,4 +1,5 @@
 var tape = require("tape"),
+    jsdom = require("../jsdom"),
     d3_selection = require("d3-selection"),
     d3_transition = require("../../");
 
@@ -6,3 +7,14 @@ tape("transition.each is the same as selection.each", function(test) {
   test.equal(d3_transition.transition.prototype.each, d3_selection.selection.prototype.each);
   test.end();
 });
+
+tape("transition.each() runs as expected", function(test) {
+  var root = jsdom().documentElement;
+  var a = 0;
+  d3_selection.select(root).transition().each(() => {++a});
+  test.equal(a, 1);
+  a = 0;
+  d3_selection.selectAll([null, root]).transition().each(() => {++a});
+  test.equal(a, 1);
+  test.end();
+});
diff --git a/test/transition/ease-test.js b/test/transition/ease-test.js
index 3ce3ac0..a52c6f4 100644
--- a/test/transition/ease-test.js
+++ b/test/transition/ease-test.js
@@ -21,8 +21,6 @@ tape("transition.ease() returns the easing function for the first non-null node"
   test.strictEqual(d3_selection.select(two).transition(transition2).ease(), d3_ease.easeBounce);
   test.strictEqual(d3_selection.selectAll([null, one]).transition(transition1).ease(), d3_ease.easeCubic);
   test.strictEqual(d3_selection.selectAll([null, two]).transition(transition2).ease(), d3_ease.easeBounce);
-  test.strictEqual(d3_selection.selectAll([one, two]).transition(transition1).ease(), d3_ease.easeCubic);
-  test.strictEqual(d3_selection.selectAll([two, one]).transition(transition2).ease(), d3_ease.easeBounce);
   test.end();
 });
 
diff --git a/test/transition/merge-test.js b/test/transition/merge-test.js
index cc3972e..0ffa2e9 100644
--- a/test/transition/merge-test.js
+++ b/test/transition/merge-test.js
@@ -7,8 +7,9 @@ tape("transition.merge(other) merges elements from the specified other transitio
   var document = jsdom("<h1 id='one'></h1><h1 id='two'></h1>"),
       one = document.querySelector("#one"),
       two = document.querySelector("#two"),
-      transition1 = d3_selection.selectAll([null, two]).transition(),
-      transition2 = d3_selection.selectAll([one, null]).transition(transition1),
+      transition0 = d3_selection.select(document.documentElement).transition(),
+      transition1 = d3_selection.selectAll([null, two]).transition(transition0),
+      transition2 = d3_selection.selectAll([one, null]).transition(transition0),
       transition3 = transition1.merge(transition2);
   test.equal(transition3 instanceof d3_transition.transition, true);
   test.deepEqual(transition3._groups, [[one, two]]);
diff --git a/test/transition/size-test.js b/test/transition/size-test.js
index 1aca51f..eb18b18 100644
--- a/test/transition/size-test.js
+++ b/test/transition/size-test.js
@@ -1,4 +1,5 @@
 var tape = require("tape"),
+    jsdom = require("../jsdom"),
     d3_selection = require("d3-selection"),
     d3_transition = require("../../");
 
@@ -6,3 +7,10 @@ tape("transition.size is the same as selection.size", function(test) {
   test.equal(d3_transition.transition.prototype.size, d3_selection.selection.prototype.size);
   test.end();
 });
+
+tape("transition.size() returns the expected value", function(test) {
+  var root = jsdom().documentElement;
+  test.equal(d3_selection.select(root).transition().size(), 1);
+  test.equal(d3_selection.selectAll([null, root]).transition().size(), 1);
+  test.end();
+});
diff --git a/yarn.lock b/yarn.lock
index f09fab9..be7c347 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -265,32 +265,37 @@ d3-color@1:
   resolved "https://registry.yarnpkg.com/d3-color/-/d3-color-1.4.0.tgz#89c45a995ed773b13314f06460df26d60ba0ecaf"
   integrity sha512-TzNPeJy2+iEepfiL92LAAB7fvnp/dV2YwANPVHdDWmYMm23qIJBYww3qT8I8C1wXrmrg4UWs7BKc2tKIgyjzHg==
 
-d3-dispatch@1:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/d3-dispatch/-/d3-dispatch-1.0.6.tgz#00d37bcee4dd8cd97729dd893a0ac29caaba5d58"
-  integrity sha512-fVjoElzjhCEy+Hbn8KygnmMS7Or0a9sI2UzGwoB7cCtvI1XpVN9GpoYlnb3xt2YV66oXYb1fLJ8GMvP4hdU1RA==
+"d3-color@1 - 2":
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/d3-color/-/d3-color-1.3.0.tgz#675818359074215b020dc1d41d518136dcb18fa9"
+  integrity sha512-NHODMBlj59xPAwl2BDiO2Mog6V+PrGRtBfWKqKRrs9MCqlSkIEb0Z/SfY7jW29ReHTDC/j+vwXhnZcXI3+3fbg==
 
-d3-ease@1:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/d3-ease/-/d3-ease-1.0.6.tgz#ebdb6da22dfac0a22222f2d4da06f66c416a0ec0"
-  integrity sha512-SZ/lVU7LRXafqp7XtIcBdxnWl8yyLpgOmzAk0mWBI9gXNzLDx5ybZgnRbH9dN/yY5tzVBqCQ9avltSnqVwessQ==
+"d3-dispatch@1 - 2":
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/d3-dispatch/-/d3-dispatch-1.0.5.tgz#e25c10a186517cd6c82dd19ea018f07e01e39015"
+  integrity sha512-vwKx+lAqB1UuCeklr6Jh1bvC4SZgbSqbkGBLClItFBIYH4vqDJCA7qfoy14lXmJdnBOdxndAMxjCbImJYW7e6g==
 
-d3-interpolate@1:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/d3-interpolate/-/d3-interpolate-1.3.3.tgz#cef4ba06dfccebcc45e4ae9d4d836a931a945076"
-  integrity sha512-wTsi4AqnC2raZ3Q9eqFxiZGUf5r6YiEdi23vXjjKSWXFYLCQNUtBVMk6uk2tg4cOY6YrjRdmSmI/Mf0ze1zPzQ==
+"d3-ease@1 - 2":
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/d3-ease/-/d3-ease-1.0.5.tgz#8ce59276d81241b1b72042d6af2d40e76d936ffb"
+  integrity sha512-Ct1O//ly5y5lFM9YTdu+ygq7LleSgSE4oj7vUt9tPLHUi8VCV7QoizGpdWRWAwCO9LdYzIrQDg97+hGVdsSGPQ==
+
+"d3-interpolate@1 - 2":
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/d3-interpolate/-/d3-interpolate-1.3.2.tgz#417d3ebdeb4bc4efcc8fd4361c55e4040211fd68"
+  integrity sha512-NlNKGopqaz9qM1PXh9gBF1KSCVh+jSFErrSlD/4hybwoNX/gt1d8CDbDW+3i+5UOHhjC6s6nMvRxcuoMVNgL2w==
   dependencies:
     d3-color "1"
 
-d3-selection@^1.1.0:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/d3-selection/-/d3-selection-1.4.1.tgz#98eedbbe085fbda5bafa2f9e3f3a2f4d7d622a98"
-  integrity sha512-BTIbRjv/m5rcVTfBs4AMBLKs4x8XaaLkwm28KWu9S2vKNqXkXt2AH2Qf0sdPZHjFxcWg/YL53zcqAz+3g4/7PA==
+"d3-selection@1.1.0 - 2":
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/d3-selection/-/d3-selection-1.4.0.tgz#ab9ac1e664cf967ebf1b479cc07e28ce9908c474"
+  integrity sha512-EYVwBxQGEjLCKF2pJ4+yrErskDnz5v403qvAid96cNdCMr8rmCYfY5RGzWz24mdIbxmDf6/4EAH+K9xperD5jg==
 
-d3-timer@1:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/d3-timer/-/d3-timer-1.0.10.tgz#dfe76b8a91748831b13b6d9c793ffbd508dd9de5"
-  integrity sha512-B1JDm0XDaQC+uvo4DT79H0XmBskgS3l6Ve+1SBCfxgmtIb1AVrPIoqd+nPSv+loMX8szQ0sVUhGngL7D5QPiXw==
+"d3-timer@1 - 2":
+  version "1.0.9"
+  resolved "https://registry.yarnpkg.com/d3-timer/-/d3-timer-1.0.9.tgz#f7bb8c0d597d792ff7131e1c24a36dd471a471ba"
+  integrity sha512-rT34J5HnQUHhcLvhSB9GjCkN0Ddd5Y8nCwDBG2u6wQEeYxT/Lf51fTFFkldeib/sE/J0clIe0pnCfs6g/lRbyg==
 
 dashdash@^1.12.0:
   version "1.14.1"