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 ...
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 ...
(1)先执行同步操作:同步操作有for循环,console.log('click begin') ,waitFiveSeconeds(),同步操作的执行顺序是从上到下的,因此执行顺序是for循环,然后是 console.log('click begin') 最后是waitFiveSeconds函数 (2)执行异步操作,setTimeout()函数属于异步操作,在同步任务执行的期间,‘timera’,‘timerb’对应的...
shown.bs.dropdown This event is fired when the dropdown has been made visible to the user (will wait for CSS transitions, to complete). hide.bs.dropdown This event is fired immediately when the hide instance method has been called. hidden.bs.dropdown This event is fired when the dropdow...
// 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); ...
},"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。
1.类(class) 对熟悉Java,object-c,c#等纯面向对象语言的开发者来说,都会对class有一种特殊的情怀。ES6 引入了class(类),让JavaScript的面向对象编程变得更加简单和易于理解。 代码语言:javascript 复制 classAnimal{constructor(name,color){this.name=name;this.color=color;}toString(){console.log('name:'+this...
shown.bs.tooltip This event is fired when the tooltip has been made visible to the user (will wait for CSS transitions to complete). hide.bs.tooltip This event is fired immediately when the hide instance method has been called. hidden.bs.tooltip This event is fired when the tooltip has fi...
ECMAScript 2015 was the second major revision to JavaScript. ECMAScript 2015 is also known as ES6 and ECMAScript 6. This chapter describes the most important features of ES6. New Features in ES6 Browser Support for ES6 (2015) ES6 is fully supported in all modern browsers since June 2017: ...