如何在Javascript跨浏览器中删除对象 [英] How to delete an object in Javascript crossbrowser

问题描述

var obj = {
    destroy: function(){this = null;}
};

obj.destroy();

这在Chrome中有效，但是由于某些原因，firefox抛出了引用此错误.有没有更好的方法可以在方法中杀死该对象?

错误:

invalid assignment left-hand side
[Break On This Error] destroy: function(){this = null;} 

解决方案

不确定Chrome为什么支持它，但是您不能为此指定值.您可以引用它，但不能为其分配值.

如果要执行一些数组销毁操作，可以在destroy方法中引用this.myArrayName并释放要释放的任何内容，但是不能仅仅为此分配null来销毁实例. /p>

我想您可以尝试这样的事情:

var foo = {
    // will nullify all properties/methods of foo on dispose
    dispose: function () { for (var key in this) this[key] = null; }
}

foo.dispose();

法律上将"this"作废的可能性就差不多了.

快乐的编码.

B

var obj = {
    destroy: function(){this = null;}
};

obj.destroy();

This works in Chrome, however firefox is throwing an error referencing this for some reason. Is there a better way to kill this object within a method?

Error:

invalid assignment left-hand side
[Break On This Error] destroy: function(){this = null;} 

解决方案

Not sure why Chrome allows for it but you can't assign a value to this. You can reference this, but you can't assign a value to it.

If you have some array destruction you want to perform you can reference this.myArrayName within your destroy method and free up whatever you're trying to release, but you can't just assign null to this to destroy an instance.

I suppose you could try something like this:

var foo = {
    // will nullify all properties/methods of foo on dispose
    dispose: function () { for (var key in this) this[key] = null; }
}

foo.dispose();

Pretty much as close as you can get to legally nullifying "this"...

Happy coding.

B

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