highlighter-embed.js

// in Mode

    var highlighter = new MarkdownHighlightRules();
    
    this.$tokenizer = new Tokenizer(highlighter.getRules());
    this.$embeds = highlighter.getEmbeds();
    this.createModeDelegates({
      "js-": JavaScriptMode
    });

// in Highlighter

    this.embedRules(JavaScriptHighlightRules, "js-", [{
       token : "constant",
       regex : "^```",
       next  : "start"
    }]);

// Whenever in a js- state, mode callbacks will be delegated to the javascript mode.
// The escape rule is also added to every js-state, to avoid being missed by a multiline state.
// (can pass an array of states to escape from optionally)