Question

<script>
    function obj1(){}
    alert(obj1.name);

    var obj2 = function(){}
    obj2.name = 'obj2';
    alert(obj2.name=='');

</script>

I have tested the code in Chrome, ff, safari

But IE9 don’t have this property .

question is where I can read documents to find all this kind of situations ?

Answer 1

The Mozilla documentation says this:

name
  Non-standard 
  The name of the function.

So, it’s a non-standard feature that is implemented by some browsers. As there is no standard to dictate how it should work, the implementation is likely to differ between browsers.

ref: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function

The Microsoft and Mozilla documentations are pretty complete, and you will find any standard feature in either of them. If you find a non-standard property like this, it will typically be documented only for the browser that does support it.

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The definitive resource for the Javascript language is of course the EcmaScript ECMA-262 standard, however it’s a lot more complicated to read than the documentation for the implementations.

For a feature in the DOM (HTML, CSS, Javscript interface), it’s the W3C organisation that specifies the standards.