Support for ***bold and italics***

app/assets/javascripts/discourse/dialects/bold_italics_dialect.js

@@ -0,0 +1,32 @@
+/**
+  Markdown.js doesn't seem to do bold and italics at the same time if you surround code with
+  three asterisks. This adds that support.
+
+  @event register
+  @namespace Discourse.Dialect
+**/
+Discourse.Dialect.on("register", function(event) {
+
+  var dialect = event.dialect,
+      MD = event.MD;
+
+  /**
+    Handles simultaneous bold and italics
+
+    @method parseMentions
+    @param {String} text the text match
+    @param {Array} match the match found
+    @param {Array} prev the previous jsonML
+    @return {Array} an array containing how many chars we've replaced and the jsonML content for it.
+    @namespace Discourse.Dialect
+  **/
+  dialect.inline['***'] = function boldItalics(text, match, prev) {
+    var regExp = /^\*{3}([^\*]+)\*{3}/,
+        m = regExp.exec(text);
+
+    if (m) {
+      return [m[0].length, ['strong', ['em'].concat(this.processInline(m[1]))]];
+    }
+  };
+
+});

test/javascripts/components/markdown_test.js

@@ -17,6 +17,7 @@ var cookedOptions = function(input, opts, expected, text) {
 
 test("basic cooking", function() {
   cooked("hello", "<p>hello</p>", "surrounds text with paragraphs");
+  cooked("***hello***", "<p><strong><em>hello</em></strong></p>", "it can do bold and italics at once.");
 });
 
 test("Line Breaks", function() {