We know that there are many ways to implement animation using HTML. This time I will teach you how to use JS to realize drag-and-drop animation in HTML. Let's take a look at the case together.
<!DOCTYPE"> <html"> <head> <style> #p1 {width:100px; height:100px; background:red; position:absolute;} </style> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <script> var oDiv=null; var disX=0; var disY=0; window.onload=function () { oDiv=document.getElementById('p1'); oDiv.onmousedown=fnDown; }; function fnDown(ev) { var oEvent=ev||event; disX=oEvent.clientX-oDiv.offsetLeft; disY=oEvent.clientY-oDiv.offsetTop; document.onmousemove=fnMove; document.onmouseup=fnUp; } function fnMove(ev) { var oEvent=ev||event; oDiv.style.left=oEvent.clientX-disX+'px'; oDiv.style.top=oEvent.clientY-disY+'px'; } function fnUp() { document.onmousemove=null; document.onmouseup=null; } </script> </head> <body> <p id="p1"> </p> </body> </html>
I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!
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本篇文章带大家了解一下HTML(超文本标记语言),介绍一下HTML的本质,HTML文档的结构、HTML文档的基本标签和图像标签、列表、表格标签、媒体元素、表单,希望对大家有所帮助!

不算。html是一种用来告知浏览器如何组织页面的标记语言,而CSS是一种用来表现HTML或XML等文件样式的样式设计语言;html和css不具备很强的逻辑性和流程控制功能,缺乏灵活性,且html和css不能按照人类的设计对一件工作进行重复的循环,直至得到让人类满意的答案。

总结了一些web前端面试(笔试)题分享给大家,本篇文章就先给大家分享HTML部分的笔试题(附答案),大家可以自己做做,看看能答对几个!

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

在html中,document是文档对象的意思,代表浏览器窗口的文档;document对象是window对象的子对象,所以可通过“window.document”属性对其进行访问,每个载入浏览器的HTML文档都会成为Document对象。

html5支持boolean值属性;boolean值属性指是属性值为true或者false的属性,如input元素中的disabled属性,不使用该属性表示值为flase,不禁用元素,使用该属性可以不设置属性值表示值为true,禁用元素。


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