Deleting a window property in IE

2018-06-09 01:06:52

I can't find any information on this issue; why doesn't the following code work in IE?

window.x = 45;
delete window.x;
// or delete window['x'];

IE reports an "object doesn't support this action" error. Does it have anything to do with that iterating over window properties in IE issue?

我会这样做：

    window[x] = undefined;
    try{
        delete window[x];
    }catch(e){}

Does this help?

window.x = 45;
alert(window.x);
window.x = null;

I tried this in IE and window.x did have a value, which proves it can be set. Setting the value to null is your best bet for clearing it out.

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