Sometimes you need to know the width or height of element (such as div or ul li). In most cases, you can get the width or height attribute of the element with javascript. But sometimes this method may not work,
height); Output: 60 So, to get the height of the element from the object returned by the getBoundingClientRect() method, we have to use the height key to get the height. Here, element height is 50px, padding is 8px and border-width is 2px. So, a total 60px height will be ...
JavaScriptJavaScript Element Video Player is loading. Current Time0:00 / Duration-:- Loaded:0% This tutorial talks about the width and height of an element and guides how we can get its height and width in JavaScript. First, we must understand the CSS box model to learn aboutoffsetWidth,off...
To get the height and width of an HTML element, you can use the offsetHeight and offsetWidth properties. These properties return the viewable height and width of an element in pixels, including border, padding, and scrollbar, but not the margin. Here is an example: const pizza = document....
functiongetBoundingClientRect(element) { if(typeofarguments.callee.offset != "number") { varscrollTop = document.documentElement.scrollTop; vartmp = document.createElement("div"); tmp.style.cssText = "position:absolute;left:0;top:0;"; ...
value=document.getElementById('id').offsetHeight 找一个元素的坐标: function findPosition( oElement ) { var x2 = 0; var y2 = 0; var width = oElement.offsetWidth; var height = oElement.offsetHeight; alert(width + "=" + height); ...
=typeof t.getElementById&&E){var n,r,i,o=t.getElementById(e);if(o){if((n=o.getAttributeNode("id"))&&n.value===e)return[o];i=t.getElementsByName(e),r=0;while(o=i[r++])if((n=o.getAttributeNode("id"))&&n.value===e)return[o]}return[]}}),b.find.TAG=d.getElements...
1、偏移量 先讲几个偏移量属性： offsetHeight：元素在垂直方向上占用的空间大小；相当于border-top+...
var button = document.getElementById('press');button.addEventListener('click', () => { this.classList.toggle('on');});代码运行时，点击按钮会出现报错，因为button的监听函数是一个箭头函数，它的this指向全局对象。如果改成普通函数，this就会动态指向被点击的按钮对象。结语 大家喜欢我写的文章的话，...
id选择器使用:document.getElementById("") 多个函数使用一个dom对象,该dom对象的接收变量提取为“全局变量” 样式操作优化 判断需要赋值的css属性是否是可变的 可变的:js实现 不变的:css类名实现样式获取优化 尽量避免在高频调用的函数之中使用dom操作