How to get computed style of a HTMLElement

no jQuery. pure javascript.

e.g. Use element.height but I got nothing.

I ever seen开发者_运维问答 code like below befow:

(ele.style || ele)[styleName]

but I forgot what it use to.

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Take a look at:

• Get the rendered style of an element

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There are some pointers in http://www.quirksmode.org/dom/getstyles.html

also, google clientHeight offsetHeight and you will find info on height.