函数实现,参数单位 秒; function wait(second) { // execSync 属于同步方法;异步方式请根据需要自行查询 node.js 的 child_process 相关方法; let ChildProcess_ExecSync = require('child_process').execSync; ChildProcess_ExecSync('sleep ' + second); }; // 调用方法;休眠 60 秒,即 1 分钟; wait( 60...
When a function is used to determine the placement, it is called with the tooltip DOM node as its first argument and the triggering element DOM node as its second. The this context is set to the tooltip instance. selector string false If a selector is provided, tooltip objects will be ...
1995年,Netscape 公司雇佣了程序员 Brendan Eich 开发这种网页脚本语言。Brendan Eich 有很强的函数式编程背景,希望以 Scheme 语言(函数式语言鼻祖 LISP 语言的一种方言)为蓝本,实现这种新语言。 1995年5月,Brendan Eich 只用了10天,就设计完成了这种语言的第一版。它是一个大杂烩,语法有多个来源。 基本语法:借鉴...
shown.bs.modal This event is fired when the modal has been made visible to the user (will wait for CSS transitions to complete). If caused by a click, the clicked element is available as the relatedTarget property of the event. hide.bs.modal This event is fired immediately when the hide...
},"secondKey": { value:"Hello World2", writable: false } }); 1.3创建构造器 Javascript不支持类的概念,但它有一种与对象一起工作的构造器函数。使用new关键字来调用该函数,我们可以告诉Javascript把这个函数当做一个构造器来用,前端培训它可以用自己所定义的成员来初始化一个对象。
When a function is used to determine the placement, it is called with the tooltip DOM node as its first argument and the triggering element DOM node as its second. The this context is set to the tooltip instance. selector string false If a selector is provided, tooltip objects will be ...
// 函数实现,参数单位 秒 ;functionwait(second){// execSync 属于同步方法;异步方式请根据需要自行查询 node.js 的 child_process 相关方法;letChildProcess_ExecSync=require('child_process').execSync;ChildProcess_ExecSync('sleep '+second);};// 调用方法;休眠 60 秒,即 1 分钟;wait(60); ...
// "Consuming Code" (Must wait for a fulfilled Promise). myPromise.then( function(value) {/* code if successful */}, function(error) {/* code if some error */} ); Example Using a Promise constmyPromise =newPromise(function(myResolve, myReject) { ...
letdefineProp=function(obj,key,value){letconfig={};config.value=value;Object.defineProperty(obj,key,config);};// 4. Object.defineProperties方式(同时设置多个属性)// 设置属性Object.defineProperties(obj,{"firstKey":{value:"Hello World",writable:true},"secondKey":{value:"Hello World2",writable:...
The problem with the second example, is that you cannot prevent the calculator function from displaying the result. Now it is time to bring in a callback. JavaScript Callbacks A callback is a function passed as an argument to another function. ...