JavaScript是一种解释执行的脚本语言,是一种动态类型、弱类型、基于原型的语言,内置支持类型,它遵循ECMAScript标准。它的解释器被称为JavaScript引擎,为浏览器的一部分,广泛用于客户端的脚本语言,主要用来给HTML增加动态功能。 几乎所有主流的语言都可以编译为JavaScript,进而能够在所有平台上的浏览器中执行,这也体现了Java...
6、console.dirxml用来显示网页的某个节点(node)所包含的html/xml代码 <body> <table id="mytable"> <tr> <td>A</td> <td>A</td> <td>A</td> </tr> <tr> <td>bbb</td> <td>aaa</td> <td>ccc</td> </tr> <tr> <td>111</td> <td>333</td> <td>222</td> </tr> </table...
= function(id) { console.log('开始同步,id为: ' + id) } var proxySynchronousFile = (function() { var cache = [], // 保存一段时间内需要同步的ID timer // 定时器 return function(id) { cache.push(id) if(timer) { // 保证不会覆盖已经启动的定时器 return } timer = setTimeout(...
test7_2.htm <html> <form name="myform"> <td vAlign="top" width="135">您在此停留了: <input name="clock" size="8" value="在线时间"></td> </form> <script language="JavaScript"> var id, iM = 0, iS = 1; start = new Date(); function go() { now = new Date(); time =...
<inputtype="text"value="223"> 让非表单元素获得焦点也是有办法的,先将tabIndex属性设置为-1,再调用focus()方法 <divid="test"style="height:30px;width:100px;background:lightgreen">div</div><buttonid="btn">div元素获得焦点</button><script>btn.onclick=function(){ ...
ipt.oninput = function () { console.log("值在改变"); div.innerText = this.value; } // 键盘抬起触发 ipt.onkeyup = function () { console.log("值在改变"); div.innerText = this.value; } // 值改变,并且在失去焦点时触发 ipt.onchange = function () { ...
If the collapsible element is closed by default, it should have a value of aria-expanded="false". If you've set the collapsible element to be open by default using the in class, set aria-expanded="true" on the control instead. The plugin will automatically toggle this attribute based on...
Default title value if title attribute isn't present. If a function is given, it will be called with its this reference set to the element that the popover is attached to. trigger string 'click' How popover is triggered - click | hover | focus | manual. You may pass multiple triggers...
*/ var val = inputValue >> 0;布尔值: var age = 0; // bad var hasAge = new Boolean(age); // good var hasAge = Boolean(age); // good var hasAge = !!age;命名约定 避免单个字符名,让你的变量名有描述意义。// bad function q() { // ...stuff... } // good function ...
nodeinstanceofUglifyJS.AST_Number){//查找需要修改的叶子节点node.value='0x'+Number(node.value)....