what's the JavaScript code for the find the 's width?
(I want get width .FixedBox
whit javascript no jquery, but my code don't work.)
alert(document.getElementsByClassName('FixedBox').offsetWidth);
<div class="FixedBox"> The HTMLElement.offsetWidth read-only property returns the layout width of an element. Typically, an element's offsetWidth is a measurement which includes the element borders, the element horizontal padding, the element vertical scrollbar (if present, if rendered) and the element CSS width. </div>
The Document.getElementsByClassName()
returns NodeList you need to get element from collection to get offsetWidth
property. Also put them inside window load callback to execute only after elements are loaded.
window.onload = function() { var ele = document.getElementsByClassName('FixedBox'); alert(ele.length ? ele[0].offsetWidth : 'no elements with the class'); }
<div class="FixedBox"> The HTMLElement.offsetWidth read-only property returns the layout width of an element. Typically, an element's offsetWidth is a measurement which includes the element borders, the element horizontal padding, the element vertical scrollbar (if present, if rendered) and the element CSS width. </div>
This might work
$('.FixedBox').load(function () {
alert(document.getElementsByClassName('FixedBox')[0].getBoundingClientRect().width)
});
alert(document.getElementsByClassName('FixedBox')[0].getBoundingClientRect().width)
<div class="FixedBox"> The HTMLElement.offsetWidth read-only property returns the layout width of an element. Typically, an element's offsetWidth is a measurement which includes the element borders, the element horizontal padding, the element vertical scrollbar (if present, if rendered) and the element CSS width. </div>
尝试这个
document.getElementsByClassName('FixedBox')[0].offsetHeight
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