Home Web Front-end JS Tutorial js获取Html元素的实际宽度高度的方法_javascript技巧

js获取Html元素的实际宽度高度的方法_javascript技巧

May 23, 2016 pm 01:15 PM
js

第一种情况就是宽高都写在样式表里,就比如#div1{width:120px;}。这中情况通过#div1.style.width拿不到宽度,而通过#div1.offsetWidth才可以获取到宽度。

第二种情况就是宽和高是写在行内中,比如style="width:120px;",这中情况通过上述2个方法都能拿到宽度。

小结,因为id.offsetWidth和id.offsetHeight无视样式写在样式表还是行内,所以我们获取元素宽和高的时候最好用这2个属性。注意如果不是写在行内style中的属性都不能通过id.style.atrr来获取。

现 在的前端制作很少直接把样式写style里了,都是写在样式表里。如果你要获取的样式没有相对应的(就像#div1.style.width对 应#div1.offsetWidth),就只能分别针对不用浏览器来获取样式表的属性了,可以试着搜索“JS 获取样式属性”之类的。

代码:

var o = document.getElementById("view");
var h = o.offsetHeight; //高度
var w = o.offsetWidth; //宽度
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