Firefox扩展警告：JavaScript名称空间污染

Question

Firefox addon example:

    var MyAddonNamespace = {
        local_variable: null,
        local_method: function() {
            return 'string';
        }
    };

window.addEventListener("load", function(e) {
    MyAddonNamespace.local_method();
}, false);

Warning: Your add-on contains a large number of global variables, which can conflict with other add-ons. For more information, see http://blog.mozilla.com/addons/2009/01/16/firefox-extensions-global-namespace-pollution/ , or use JavaScript modules.

How I can fix it? Thanks in advance.

Answer 1

You can hide variables from the global scope by putting them into an anonymous function ( explanation of anymous functions ).

In your case that would look as follows:

(function(){
    var MyAddonNamespace = {
       local_variable: null,
       local_method: function() {
          return 'string';
       }
   };
   window.addEventListener("load", function(e) {
      MyAddonNamespace.local_method();
   }, false);
})();