javascript in void operator delete and

2010-04-18  来源:本站原创  分类:Web  人气:204 

delete operator to delete the previously defined reference object property or method

For example, you delete an array of a key like this

delete array [2];

In fact, this reference is deleted, it set undefined

void operator of any values returned undefined.

If you want to open a blank browser, such as you are so write

<a href="javascript:window.open('about:blank')"> Click Open  </a>

If you put this code on the html page, click to see the screen [object] words, because the window.open method returns a reference to the new open windows. Then the object is converted to the string to be displayed.

To avoid this result, void comes in handy. For example like this:

<a href="javascript:void(window.open('about:blank'))"> Click Open  </a>
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