JavaScript

Objects (object) should be the most important part of JS, is also very difficult to understand the obscure part of JS. It is also the interview and the frame design of each haunt. In this article, the main reference is JavaScript Red Book (sixth

1. The first kind:Copy CodeThe code is as follows: function IsPC () {var useragentinfo = navigator.useragent;var Agents = ["Android", "IPhone","SymbianOS", "Windows Phone","IPad", "IPod");var flag = true;for (var v = 0; v if (Useragentinfo.indexof

Closures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.-The scope of a variableTo understand closures, you must first understand the special variable scope of JavaScript.The

In JavaScript, a function is allowed to be defined by a direct amount. In general, when we define a function, the most common way is to define it via a function statement, for example:function sum (A, b) {return a+b;}In this way, the SUM function

Math (arithmetic objects) performs common arithmetic tasks.1. Properties of the Math object// The base of the natural logarithm, which is the value of the constant e // Natural logarithm of 10 // Natural logarithm of 2 // 2 logarithm of base e // 10

href= "javascript:;" > a > href= "#">a>These two kinds of wording. What is the difference between these two types of writing? What kind of writing is more standard?href= "#" refers to the connection to the current page, in fact, is meaningless,

First, the Process Control statement (if statement) in JSFormat:if ( condition 1) {if condition 1 is established, execute the code here}Else{if the condition is not true , execute the code here}format :if ( condition 1) {if condition 1 is

JS Create clock:1. Reference Link: note getYear (two-bit or four-bit) changed to getFullYearJS operation time2. Example:Html:1 class= "Glyphicon glyphicon-time" style= "color: #fff; padding-left:10px;" > span > style= "color: #fff;" ID = "ETime"

The lexical structure of a programming language is a set of basic rules that describe how to use the language to write programs.1. Character SetJavaScript programs are written in the Unicode character set.1.1 Case-sensitiveJavaScript is a

Write an enemy class first./*Create enemy Aircraft:*/functionEnemy (blood,speed,imgs) {//enemy aircraft left This. left = 0; //top of enemy aircraft This. top = 0; //enemy's blood volume This. Blood =Blood; //Enemy aircraft Speed

Arithmetic operators:plus +, minus-, multiply *, save /, seek %, + + +, minus minus- -,The subtraction computation is exactly the same as the mathematical usage.However, the plus + also has the function of the connection string, and other operators

1. function has return value$ (function () {function Person (name,age,job) {var o=new Object ();O.name=name;O.age=age;O.job=job;O.sayhi=function () {Console.log (this.name);}return o;}var people= new person (' Xiaowang ', ' Developer

The timer in JavaScript everyone has met in the normal development, but how many people to deeply understand the principle of it? In this paper, we will analyze the implementation of the principle of the timer, the magic of the timer, timer use

When debugging WebView in Chrome, there is a blank solution (using offline packages without Fan walls) and webviewinspect.Cause WebView debugging is indispensable when Android applications are developed using HTML5. The front-end developer tool is

Css selector (basic) and css selector Basics CSS selector: The syntax of a style is composed of three parts: Selector + attribute value;   What is a selector?   A: In my straightforward understanding, the selector is used to select a label to

Width: 100% what is the benchmark test, width reference At first, we encountered the following problem: when the box model is set to box-sizing: border-box; (this is often done on mobile terminals ). The sub-box width: 100%. Is the sub-box width

Javascript + html5 + css3 custom pop-up window effect, html5css3 The examples in this article share with you the code for displaying the js custom pop-up window effects for your reference. The details are as follows: : Source code: 1. demo. jsp

Clever operations on regular expressions in JS and clever operations on JS If you don't talk much about it, paste the Code directly. The specific code is as follows: Var msg = "dsada [emoji: 37] dsadas [emoji: 3900] farfarafen River"; function

Second understanding-Single Column Layout horizontal center layout, Single Column Layout Horizontal center layout Advantages: good compatibility; Insufficient: You need to set both child and parent elements. horizontal center layout 1

Points of attention in es6's learning and deconstruct in es6's Learning Preface This article mainly introduces some things that need to be paid attention to during es6 deconstruct and shares them for your reference. I will not talk about them much