Question

I’m writing a web application platform that serves JavaScript applications to a browser. Needless to say, I launch an application with a JS method after the document has loaded, but on IE9 nothing happens if the developer console hasn’t been fiddled with.

This seems like the typical missing console problem, but I couldn’t fix it by adding a check for console or removing console calls from the source code.

Can you guys spot where I’m going wrong?

• The site: http://eiskis.net/proot/pika/proot/
• JS source: http://eiskis.net/proot/pika/proot/assets/behavior

I’m serving multiple separate web apps with the same platform, so you can also check out the following (the problem appears the same all over):

• http://eiskis.net/proot/pika/baseline
• http://eiskis.net/proot/pika/docs
• http://eiskis.net/proot/pika/fails
• http://eiskis.net/proot/pika/helloworld

Answer 1

Object.keys is not supported in all versions of internet explorer :
Please refer to the following : https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/keys
The following (from the source mentioned above) adds Object.keys to the browsers that do not support it :

if (!Object.keys) {
  Object.keys = (function () {
    var hasOwnProperty = Object.prototype.hasOwnProperty,
        hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
        dontEnums = [
          'toString',
          'toLocaleString',
          'valueOf',
          'hasOwnProperty',
          'isPrototypeOf',
          'propertyIsEnumerable',
          'constructor'
        ],
        dontEnumsLength = dontEnums.length

    return function (obj) {
      if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object')

      var result = []

      for (var prop in obj) {
        if (hasOwnProperty.call(obj, prop)) result.push(prop)
      }

      if (hasDontEnumBug) {
        for (var i=0; i 

In addition, your method of checking the existence of console is erroneous :

Try running (http://jsfiddle.net/PytAh/) in internet explorer:

if (console){
    alert("there");
} else {
    alert("not there");
}

It will generate an error showing that console does not exist.
You can replace it by :

if (window.console){
    alert("there");
} else {
    alert("not there");
}