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...
o=g.url||cfg.src,r=function(){return s(o,null)};function s(d,t){if((n=navigator)&&(~(n=(n.userAgent||"").toLowerCase()).indexOf("msie")||~n.indexOf("trident/"))&&~d.indexOf("ai.3")&&(d=d.replace(/(\/)(ai\.3\.)([^\d]*)$/,function(e,t,n){return t+"ai...
timeToAction自初始页面加载以来用户点击元素花费的时间(毫秒)。87407 添加Click Analytics 插件 用户可以通过 JavaScript (Web) SDK 加载程序脚本或 npm 设置 Click Analytics 自动收集插件,然后选择性地添加框架扩展。 备注 对检测密钥引入的支持将于 2025 年 3 月 31 日结束。 仪器密钥数据摄取功能将继续保持正常运...
jsCopy to Clipboard // 在网页浏览器中,window 对象也是全局对象: console.log(this === window); // true this.b = "MDN"; console.log(window.b); // "MDN" console.log(b); // "MDN" 如果源代码作为模块加载(对于 HTML,这意味着在 标签中添加 type="module"),在顶层,this 总是undefined...
break do instanceof typeof case else new var catch finally return void continue for switch while debugger* function this with default if throw delete in try ECMA-262 还描述了另外一组不能用作标识符的保留字。尽管保留字在这门语言中还没有任何特定的用途,但它们有可能在将来被用作关键字。以下是 ...
ContinueStmt: a “continue” statement; use ContinueStmt.getLabel() to access its (optional) target label. ReturnStmt: a “return” statement; use ReturnStmt.getExpr() to access its (optional) result expression. ThrowStmt: a “throw” statement; use ThrowStmt.getExpr() to access its thrown...
In this example, the variablexhsstarts from02each time it loops. As long asxhsless than10, the cycle will continue. for statement forstatement is also the first test statement, except that the initialization code before entering the loop (initialization) and the expression to be executed after...
You can use JavaScript to do supplemental processing after a breakpoint is hit. For example, script can be used to examine other run time values and then determine if you want to automatically continue code execution or stop and do additional manual debugging. ...
if_return (default: true)— optimizations for if/return and if/continue imports (default: true)— drop unreferenced import symbols when used with unused inline (default: true)— inline calls to function with simple/return statement: false— same as 0 0— disabled inlining 1— inline simple ...
API versions 4.24 and earlier will continue to include the packages. The Dojo loader will continue to be included, to allow for AMD support in the browser.dojoConfig exampleAdded classes, properties, methods, eventsComplete list of added Classes, Properties, Methods, Events....