Brackets' CodeMirror simple-mode demo

main.js

define(function (require, exports, module) {
    var CodeMirror          = brackets.getModule("thirdparty/CodeMirror/lib/codemirror"),
        LanguageManager     = brackets.getModule("language/LanguageManager");
    
    CodeMirror.defineSimpleMode("handlebars", {
    start: [
      { regex: /\{\{!--/, push: "dash_comment", token: "comment" },
      { regex: /\{\{!/,   push: "comment", token: "comment" },
      { regex: /\{\{/,    push: "handlebars", token: "tag" }
    ],
    handlebars: [
      { regex: /\}\}/, pop: true, token: "tag" },

      // Double and single quotes
      { regex: /"(?:[^\\]|\\.)*?"/, token: "string" },
      { regex: /'(?:[^\\]|\\.)*?'/, token: "string" },

      // Handlebars keywords
      { regex: />|[#\/]([A-Za-z_]\w*)/, token: "keyword" },
      { regex: /(?:else|this)\b/, token: "keyword" },

      // Numeral
      { regex: /\d+/i, token: "number" },

      // Atoms like = and .
      { regex: /=|~|@|true|false/, token: "atom" },

      // Paths
      { regex: /(?:\.\.\/)*(?:[A-Za-z_][\w\.]*)+/, token: "variable-2" }
    ],
    dash_comment: [
      { regex: /--\}\}/, pop: true, token: "comment" },

      // Commented code
      { regex: /./, token: "comment"}
    ],
    comment: [
      { regex: /\}\}/, pop: true, token: "comment" },
      { regex: /./, token: "comment" }
    ]
  });

  CodeMirror.defineMIME("text/x-handlebars-template", "handlebars");
    
 LanguageManager.defineLanguage("handlebars", {
        name: "Handlebars",
        mode: ["handlebars", "text/x-handlebars-template"],
        fileExtensions: ["hbrs"]
    });
    
});