Merge pull request #413 from mathjax/develop

Version 2.1.1

.travis.yml

@@ -4,6 +4,7 @@ node_js:
 - '7'
 - '8'
 - '9'
+- '10'
 - stable
 sudo: false
 script:

lib/main.js

@@ -74,7 +74,8 @@ var STATE = {
   STOPPED: 1,          // no DOM or MathJax available
   STARTED: 2,          // DOM loaded, MathJax starting up
   READY:   3,          // MathJax initialized and ready to process math
-  BUSY:    4           // MathJax currently processing math
+  BUSY:    4,          // MathJax currently processing math
+  RESTART: 5,          // start() called while MathJax is starting up
 };
 
 //
@@ -91,6 +92,7 @@ var document, window, content, html; // the DOM elements
 var queue = [];       // queue of typesetting requests of the form [data,callback]
 var data, callback, originalData;   // the current queue item
 var errors = [];      // errors collected durring the typesetting
+var sErrors = [];     // errors collected durring MathJax startup
 var ID = 0;           // id for this SVG element
 
 //
@@ -518,8 +520,15 @@ function ConfigureMathJax() {
       MathJax.Hub.Register.StartupHook("End",function () {
         if (MathJax.OutputJax.SVG.resetGlyphs) MathJax.OutputJax.SVG.resetGlyphs(true);
         MathJax.ElementJax.mml.ID = 0;
-        serverState = STATE.READY;
-        MathJax.Hub.Queue(StartQueue);
+        if (serverState === STATE.RESTART) {
+          setTimeout(RestartMathJax, 100);
+        } else {
+          serverState = STATE.READY;
+          MathJax.Hub.Queue(
+            function () {sErrors = errors},
+            StartQueue
+          );
+        }
       });
     }
   };
@@ -528,7 +537,7 @@ function ConfigureMathJax() {
     //
     // Parse added extensions list and add to standard ones
     //
-    var extensionList = extensions.split(/s*,\s*/);
+    var extensionList = extensions.split(/\s*,\s*/);
     for (var i = 0; i < extensionList.length; i++) {
       var matches = extensionList[i].match(/^(.*?)(\.js)?$/);
       window.MathJax.extensions.push(matches[1] + '.js');
@@ -730,7 +739,7 @@ function GetSVG(result) {
 //
 function StartQueue() {
   data = callback = originalData = null;       //  clear existing equation, if any
-  errors = [];                  //  clear any errors
+  errors = sErrors; sErrors = [];              //  clear any errors
   if (!queue.length) return;    //  return if nothing to do
 
   serverState = STATE.BUSY;
@@ -943,9 +952,17 @@ exports.typeset = function (data, callback) {
 
 //
 //  Manually start MathJax (this is done automatically
-//  when the first typeset() call is made)
-//
-exports.start = function () {RestartMathJax()}
+//  when the first typeset() call is made), but delay
+//  restart if we are already starting up (prevents
+//  multiple calls to start() from causing confusion).
+//
+exports.start = function () {
+  if (serverState === STATE.STARTED) {
+    serverState = STATE.RESTART;
+  } else if (serverState !== STATE.ABORT) {
+    RestartMathJax();
+  }
+}
 
 //
 //  Configure MathJax and the API