JavaScript

Implementation of prototype inheritance1 Simplified versionfunction Superclass () {...} function Subclass () {...} Subclass.prototype=new superclass ();Subclass.prototype.constructor=subclass;Note: This method is correct in most cases, but sometimes

One of the hottest technologies in today's JavaScript technology World is ' event delegation '. Using Event delegation techniques allows you to avoid adding event listeners to a particular node, and instead, event listeners are added to their parent

I've been using the printf debugger, which is generally smooth, but sometimes you'll find that you need a better approach. Here are a few JavaScript tips that you'll find very useful:1. Debugger;As I've said before, you can add a debugger to your

1 , basic data type : String, Decimal, Integer, DateTime, Boolean, and so on.2, variable: "var" definition variable: var A; all variable definitions are defined with Var, var is a generic mutable type.3, type conversion: converted to integers:

JavaScript is the most popular scripting language in the world, because all of the pages you browse on your computer, mobile phone, tablet, and countless HTML5-based mobile apps, the logic of interaction is JavaScript-driven.To put it simply,

I. CharAt (index) returns the character of one index of a string.Syntax: Str.charat (index);var str= ' I am Chinese '; Console.log (Str.charat (3)); // output "Country", index number starting from 0, passing in the number 3, is to get the character

General there are two ways, the first is the method of jquery, the second is JS original Method 1. $.isarray (obj) 2. Obj instanceof array is actually found to be able to determine whether an object is an array, but only the object of a simple

Get a random number of 0-9:Math.Round (Math.random () *9);To remove duplicate elements from an array:var arr=[1,3,5,4,3,3,1,4]function editarr (arr) {var result=[];for (var i=0; iThe + function parsequery is used to parse URL query parameters .-The

Encodes the string as a URI component.There are three functions in JavaScript that can encode strings, namely: Escape,encodeuri,encodeuricomponent, corresponding 3 decoding functions: Unescape,decodeuri, decodeURIComponent.Escape () escapes all

types, values, and variables1, primitive type number, string, and Boolean null null undefined not defined2. Object type3, class Array Function Date RegExp Error4. Integrated garbage collection in JS parser5, any value of JS can be converted to a

Front-end learning of the sixth bullet: functions and closures in JavaScriptWhen function is nested within function, internal function can access variables in external functionfunction foo (x) {var tmp = 3;function Bar (y) {Alert (x + y +

JavaScript data is divided into two main categories: 1. Underlying type (raw type data) 2. Reference type. The way they're stored is different.The underlying type of data store is stored in the stack memory:For example: Var a=1; var b=a;1 var a=1; 2

ScopeThe general level of technology is limited, there is nothing wrong, I hope you correct.Scopes are the scopes in which variables work. Scopes include global scopes, function scopes at block-level scope, and let and const in ES6 can form

As a JS beginner. If you hear a few terms like "Modular Build & Modular Loading" "webpack&browserify" or "Amd&cmd", it's definitely a messy moment.The modularity of JavaScript sounds esoteric, but it is particularly useful for developers to

Statement:-----------------------------------Basic execution Unit, with all statements ending with semicolonsThe With statement avoids repeated input, such asWith (document){Writeln ("a");Writeln ("B");Writeln ("C");}Process Control:-----------------

1. PrefaceArguments, caller, what is callee?What is the role in JavaScript? This article will do some basic introduction.This article was reproduced from: http://blog.csdn.net/oscar999/article/details/85113352. ArgumentsArguments: When a function is

one, Array ObjectArrayobject.reverse () flips the arrayArrayobject.shift () Deletes the first element in the array and returns itArrayobject.unshift ( element 1, element 2) adds one or more array elements to the beginning of the array and returns

New Feature of CSS3, common drawing, and new feature of css3 Recently, I am preparing to develop my own webpage. In the design draft, I plan to design a rectangle, a rectangle displayed in the hover style, and some portraits. In the past, apart from

CSS Variable and cssvariable This is an exciting innovation. CSS variables, as the name implies, are used by the webpage author or user-defined entities to specify specific variables in the document. More accurately, it should be called CSS custom

The simplest implementation method for determining the font type in JavaScript, And the javascript font type This article mainly introduces the most concise implementation method for determining the entire word type in JavaScript. This article