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For different browsers to get the relevant attributes in css files, I believe that many inexperienced people do not know what to do. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Let's look at an example first.

The code is as follows:

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* {font-size:50px;}

At this point, if you use document.querySelector ("p"). Style.fontSize does not get the 50px value, but document.querySelector ("div"). Style.fontSize returns 100.

So you can know that document.querySelector (elements). Style only targets the attributes on the and tags, how to get the attributes in the external css file?

Here are two methods for different browsers

1 、 obj.currentStyle

2 、 window.getComputedStyle

The code is as follows:

Function getCurCss (id,porp) {

Var obj = document.getElementById (id)

If (obj.currentStyle) {

Return obj.currentStyle [prop]

} else if (window.getComputedStyle) {

Propprop = prop.replace (/ ([Amurz]) / g, "- $1")

Propprop = prop.toLowerCase ()

Return document.defaultView.getComputedStyle (obj, null) [prop]

}

Return null

}

GetCurCss (id, "fontSize")

After reading the above, have you mastered the two ways to get the relevant properties in css files for different browsers? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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