Determine whether the object is the js code of window_javascript skills

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The results are varied:
[object Object]IE6
[object Object]IE8
[object Window]firefox3.6
[object Window]opera10
[object DOMWindow]safai4. 04
[object global]chrome5.0.3.22
Look at how Heheming determines it and determine whether it has a property called setInterval. Gee, it doesn’t seem too rigorous, but it can’t be more rigorous, because it is impossible to determine whether a generalized function is a function in IE. Object.prototype.toString.call always prints [object Object], and there is no name attribute. Because it was too easy to copy, it was discarded.
In desperation, check its attributes one by one to see if there are any special attributes. I finally discovered that there is a window property with the same name, which refers to itself in an infinite loop. This is still a problem in IE.

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If you need to introduce external Js, you need to refresh to execute
]

IE will pop up false, and other browsers will pop up true. However, all browsers are unified as follows:

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Is there any strict judgment? Don't forget that window refers to itself in an infinite loop. It should be said that it refers to the previous self. Therefore, we can:

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If you need to introduce external Js, you need to refresh it. Execute

] and finally get:

Copy the code

The code is as follows:

var isWindow = function(obj){
return obj.window === obj.window.window
}

=========== ===========Gorgeous dividing lines====================== Thanks to Ivony for the inspiration!

Copy code

The code is as follows:


function isWindow( obj ){
if(typeof obj !== "object") return false;//Must be an object
var expando = "dom" (new Date-0) //Generate a random variable name
//Global parsing code, IE eval is only valid for the original scope
//See http://www.javaeye.com/topic/519098 for details
//In addition, eval and with are prohibited in HTML5 strict mode, so discard them!
var js = document.createElement("script");
var head = document.getElementsByTagName("head")[0];
head.insertBefore(js,head.firstChild);
js.text = expando " = {};"
head.removeChild(js)

return window[expando] === obj[expando] <script>alert(Object.prototype.toString.call(window))</script>} <script>alert(window === window.window)</script>isWindow(window) <script>alert(window == window.window)</script><script>alert(window.window === window.window.window)</script>