Add banner

src/docs/constants/docs.constants.ts

@@ -161,6 +161,12 @@ export const COMPONENT_ROUTES: ComponentRoute[] = [
 
     description: "A main banner for landing pages.",
   },
+  {
+    path: "/components/banner",
+    title: "Banner",
+
+    description: "Inside page banner",
+  },
 
   {
     path: "/components/popover",

src/lib/components.ts

@@ -1,5 +1,6 @@
 export { default as Back } from "./components/Back.svelte";
 export { default as Backdrop } from "./components/Backdrop.svelte";
+export { default as Banner } from "./components/Banner.svelte";
 export { default as BottomSheet } from "./components/BottomSheet.svelte";
 export { default as BusyScreen } from "./components/BusyScreen.svelte";
 export { default as Card } from "./components/Card.svelte";

src/lib/components/Banner.svelte

@@ -0,0 +1,84 @@
+<script lang="ts">
+  export let testId: string | undefined = undefined;
+  import { DEFAULT_ICON_SIZE } from "$lib/constants/constants";
+  import IconClose from "$lib/icons/IconClose.svelte";
+  import { createEventDispatcher } from "svelte";
+
+  export let visible: boolean = true;
+
+  const dispatch = createEventDispatcher();
+
+  function setVisibilityFalse() {
+    visible = false;
+    dispatch("nnsClose");
+  }
+</script>
+
+{#if visible}
+  <div
+    class="banner"
+    data-tid={testId}
+    style="--default-icon-size: {DEFAULT_ICON_SIZE}px;"
+  >
+    <div class="icon-background">
+      <div class="icon-wrapper">
+        <slot name="icon" />
+      </div>
+    </div>
+    <div class="text-content">
+      <slot name="title" />
+      <slot name="description" />
+    </div>
+    <div class="action-wrapper">
+      <slot name="action" />
+    </div>
+    <button class="close-button icon-only" on:click={setVisibilityFalse}>
+      <IconClose />
+    </button>
+  </div>
+{/if}
+
+<style lang="scss">
+  @use "../styles/mixins/fonts";
+
+  .banner {
+    display: flex;
+    align-items: center;
+    background: var(--banner-background, var(--input-background));
+    border-radius: var(--banner-radius, var(--border-radius));
+    padding: var(--banner-top-bottom-padding, var(--padding))
+      var(--banner-left-right-padding, var(--padding-1_5x));
+    column-gap: var(--banner-column-gap, var(--padding-1_5x));
+  }
+
+  .icon-background {
+    padding: var(--icon-background-padding, 6px);
+    background-color: var(
+      --icon-background-color,
+      var(--dropdown-border-color)
+    );
+    border-radius: var(--icon-border-radius, 50%);
+  }
+
+  .icon-wrapper {
+    color: var(--icon-color, var(--elements-icons));
+  }
+
+  .action-wrapper {
+    flex-shrink: 0;
+    --button-min-height: 40px;
+  }
+
+  .text-content {
+    display: flex;
+    flex-direction: column;
+    flex-grow: 1;
+  }
+
+  .close-button {
+    padding: var(--close-button-padding, 10px);
+    border-radius: var(--close-button-border-radius, var(--border-radius));
+    background: var(--close-button-background, var(--card-background));
+    color: var(--elements-icons);
+  }
+</style>

src/lib/styles/global/fonts.scss

@@ -55,6 +55,7 @@ textarea {
   --font-size-h4: 1.142857142857143rem; // 16px / 14px
   --font-size-h5: 1rem;
   --font-size-standard: 16px;
+  --font-size-secondary: 0.875rem; // 14px
   --font-size-small: 0.785714285714286rem; // 11px / 14px
 
   --line-height-h1: 1.333333333333333; // 32
@@ -63,6 +64,7 @@ textarea {
   --line-height-h4: 1.25; // 20
   --line-height-h5: var(--line-height-standard);
   --line-height-standard: 1.142857142857143; // 16 / 14 because 14px was the original base font size defined by the designer to calculate that family of font sizes
+  --line-height-secondary: 1.285714285714286; // 18
   --line-height-small: 1.181818181818182; // 13
 
   --font-weight-bold: 450;

src/lib/styles/mixins/_fonts.scss

@@ -40,6 +40,12 @@
   @include bold($bold);
 }
 
+@mixin secondary($bold: false) {
+  font-size: var(--font-size-secondary);
+  line-height: var(--line-height-secondary);
+  @include bold($bold);
+}
+
 @mixin small($bold: false) {
   font-size: var(--font-size-small);
   line-height: var(--line-height-small);

src/routes/(split)/components/banner/+page.md

@@ -0,0 +1,132 @@
+<script lang="ts">
+  import Banner from "$lib/components/Banner.svelte";
+  import IconInfo from "$lib/icons/IconInfo.svelte";
+</script>
+
+# Banner
+
+A versatile component to render informative banners with customizable content, actions, and visibility control.
+
+| Property  | Description                                                     | Type                    | Default     |
+| --------- | --------------------------------------------------------------- | ----------------------- | ----------- |
+| `testId`  | Add a `data-tid` attribute to the DOM, useful for test purpose. | `string` or `undefined` | `undefined` |
+| `visible` | Controls the visibility of the banner.                          | `boolean`               | `true`      |
+
+## Slots
+
+| Slot name     | Description                                                                 |
+| ------------- | --------------------------------------------------------------------------- |
+| `icon`        | Icon appearing at the start of the banner.                                  |
+| `title`       | Title of the banner.                                                        |
+| `description` | Description text below the title. It should explain the banner's purpose.   |
+| `action`      | Located on the right side of the banner. Useful for call-to-action buttons. |
+
+## Events
+
+| Event      | Description                                  |
+| ---------- | -------------------------------------------- |
+| `nnsClose` | Dispatched when the close button is clicked. |
+
+## Showcase
+
+The component has its own background color and visibility control, which can be customized using props and CSS variables.
+
+### Example
+
+<Banner>
+  <IconInfo slot="icon" />
+  <span slot="title" class='title'>Your ICP Wallet</span>
+  <span slot="description" class="description">
+    Create and link accounts, transfer ICP, participate in governance, and earn
+    rewards.
+  </span>
+  <button class="secondary" slot="action">Make Neurons Public</button>
+</Banner>
+
+<br />
+
+<style lang="scss">
+  @use "../../../../lib/styles/mixins/fonts";
+
+  .title {
+    @include fonts.secondary(true);
+  }
+  .description {
+    @include fonts.secondary(false);
+  }
+</style>
+
+#### Code
+
+```text
+<Banner>
+<IconInfo slot="icon" />
+<span slot="title">Your ICP Wallet</span>
+<span slot="description" class="description">
+Create and link accounts, transfer ICP, participate in governance, and earn
+rewards.
+</span>
+<button class="primary" slot="action">Connect Wallet</button>
+</Banner>
+
+<style lang="scss">
+  @use "../../../../lib/styles/mixins/fonts";
+
+  .title {
+    @include fonts.secondary(true);
+  }
+  .description {
+    @include fonts.secondary(false);
+  }
+</style>
+
+```
+
+## Visibility Control
+
+The Banner component includes built-in visibility control:
+
+- The `visible` prop controls the visibility of the banner.
+- When the close button is clicked, the `visible` prop is set to `false` and an `nnsClose` event is dispatched.
+
+## Customization
+
+You can customize the appearance of the Banner component using CSS variables:
+
+| CSS Variable                   | Description                          | Default Value                  |
+| ------------------------------ | ------------------------------------ | ------------------------------ |
+| `--banner-background`          | Background color of the banner       | `var(--input-background)`      |
+| `--banner-radius`              | Border radius of the banner          | `var(--border-radius)`         |
+| `--banner-top-bottom-padding`  | Vertical padding inside the banner   | `var(--padding)`               |
+| `--banner-left-right-padding`  | Horizontal padding inside the banner | `var(--padding-1_5x)`          |
+| `--banner-column-gap`          | Gap between banner elements          | `var(--padding-1_5x)`          |
+| `--icon-background-padding`    | Padding around the icon              | `6px`                          |
+| `--icon-background-color`      | Background color of the icon wrapper | `var(--dropdown-border-color)` |
+| `--icon-border-radius`         | Border radius of the icon wrapper    | `50%`                          |
+| `--icon-color`                 | Color of the icon                    | `var(--elements-icons)`        |
+| `--close-button-padding`       | Padding of the close button          | `10px`                         |
+| `--close-button-border-radius` | Border radius of the close button    | `var(--border-radius)`         |
+| `--close-button-background`    | Background color of the close button | `var(--card-background)`       |
+
+Example of customization:
+
+```svelte
+<Banner>
+  <!-- Banner content -->
+</Banner>
+
+<style lang="scss">
+  :global(.banner) {
+    --banner-background: #f0f8ff;
+    --banner-radius: 10px;
+    --banner-top-bottom-padding: 12px;
+    --banner-left-right-padding: 18px;
+    --banner-column-gap: 18px;
+    --icon-background-color: #e6f3ff;
+    --icon-color: #0056b3;
+    --close-button-background: #ffffff;
+  }
+</style>
+```
+
+This customization will apply a light blue theme to the banner and adjust the padding, border radius, and colors.

src/tests/lib/components/Banner.spec.ts

@@ -0,0 +1,49 @@
+import Banner from "$lib/components/Banner.svelte";
+import { fireEvent, render } from "@testing-library/svelte";
+import BannerTest from "./BannerTest.svelte";
+
+describe("Banner", () => {
+  it("should render the banner when visible is true", () => {
+    const { container } = render(Banner);
+    expect(container.querySelector(".banner")).not.toBeNull();
+  });
+
+  it("should not render the banner when visible is false", () => {
+    const { container } = render(Banner, { props: { visible: false } });
+    expect(container.querySelector(".banner")).toBeNull();
+  });
+
+  it("should render slotted content", () => {
+    const { getByText } = render(BannerTest);
+    expect(getByText("Test Icon")).toBeInTheDocument();
+    expect(getByText("Test Title")).toBeInTheDocument();
+    expect(getByText("Test Description")).toBeInTheDocument();
+    expect(getByText("Test Action")).toBeInTheDocument();
+  });
+
+  it("should close the banner when close button is clicked", async () => {
+    const { container, component } = render(Banner);
+
+    const closeButton = container.querySelector(
+      ".close-button",
+    ) as HTMLButtonElement;
+    expect(closeButton).not.toBeNull();
+
+    const onClose = vi.fn();
+    component.$on("nnsClose", onClose);
+
+    await fireEvent.click(closeButton);
+
+    expect(onClose).toHaveBeenCalled();
+    expect(container.querySelector(".banner")).toBeNull();
+  });
+
+  it("should apply custom test ID", () => {
+    const testId = "custom-banner-id";
+    const { container } = render(Banner, { props: { testId } });
+
+    const banner = container.querySelector(".banner");
+    expect(banner).not.toBeNull();
+    expect(banner?.getAttribute("data-tid")).toBe(testId);
+  });
+});

src/tests/lib/components/BannerTest.svelte

@@ -0,0 +1,10 @@
+<script lang="ts">
+  import Banner from "$lib/components/Banner.svelte";
+</script>
+
+<Banner>
+  <span slot="icon">Test Icon</span>
+  <span slot="title">Test Title</span>
+  <span slot="description">Test Description</span>
+  <button slot="action">Test Action</button>
+</Banner>