JavaScript

This article translates the JavaScript Tutorial playlist of up master Kudvenkat on YouTubeSOURCE Address here:https://www.youtube.com/watch?v=PMsVM7rjupU&list=PL6n9fhu94yhUA99nOsJkKXBqokT3MBK0bWhen should we use the Swtich statementTo enhance

FirstFirst, define a class using the keyword function function Shape1 (ax,ay) {// The function is considered to be the flag of the declaring class var x=0 ; var y=0 ; var init=function () {// The constructor assigns a value to the

The ECMAScript variable contains values for two different data types: the base type value and the reference type value. A primitive type value refers to a simple data segment, whereas a reference type value refers to an object that may consist of

Description of the inheritance in javascript:Many object-oriented languages support two ways of inheriting: interface inheritance and implementation inheritance. Interface inheritance inherits only the method signature, while implementing

The main way to add JavaScript to an HTML page is to use strings appear in , the "\" escape character is used to escape "" this format in HTML, and this with src tag, the middle is no longer add JavaScript code.(Src refers to the source of the

Overview:The split () method splits a string into an array of strings and returns this arraySyntax format: 1 stringObject.split(separator,limit) Parameter description:Note: If you use an empty string ("") as a

Introduction to Objects in JavaScript: ECMA-262 defines an object as: "A collection of unordered attributes whose properties can contain basic values, objects, or functions." "Strictly speaking, this is equivalent to saying that the object is a set

Note: Most of the content is copied from the Internet, the code for their own handwriting. Only the restudying of knowledge is not original.1. Bubble sort (Bubble sort)(1) Algorithm descriptionBubble sort is a simple sort algorithm. It repeatedly

JavaScript streamlined notes, excerpted from Liaoche's official website.[From] https://www.liaoxuefeng.com/wiki/001434446689867b27157e896e74d51a89c25cc8b43bdb3000' Use strict '; Strict modeJavaScript is strictly case sensitive.Nan = = = Nan;

JavaScript Common Regular Expression instancesInstance Source1 varMyregexp = {2 //Check if the string is a legitimate QQ number3ISQQ:function(str) {4 //1 First position cannot be 0 ^[1-9]5 //2 must be a number of [5, 11] bits \d{4

　　In JavaScript, the logical NOT operator is the same as the logical not operator in C and Java, and is represented by an exclamation point (!). Unlike the logical OR and logical and operators, the logical NOT operator must return a Boolean value

1.获取字符串的长度：var s = "Hello world";document.write("length:"+s.length);2. Adding various styles to a stringvar txt = "Some words";document.write("Big: " + txt.big() + "")document.write("Small: " + txt.small() + "")document.write("Bold: " + txt.bold() +

The splice () method in JavaScript is a strong array method that has many uses.The main purpose of splice () is to insert items into the middle of the array.There are 3 ways of doing this:Delete --You can delete any number of items, just specify 2

Push methodAdds a new element to an array and returns the new length value of the array.arrayObj.push([item1 [item2[. . . [itemN ]]]])DescriptionThe push method adds these elements in the order in which the new elements appear (that is, append new

The array class can be defined as follows:var avalues = new Array ();If you know the length of the array beforehand, you can pass the length with the parametervar avalues = new Array (20);------------------the following 2 ways to define the same-----

Previous wordsFor determining whether an object is an array, it has always been a classic problem with arrays. This article specifically selects the problem and describes what is the correct way to detect JavaScript arraystypeofFirst, use the most

Previous wordsMost of the operators in JavaScript are represented by punctuation, a few are represented by keywords, their syntax is concise, and their numbers are quite large. Operators always follow some fixed syntax and only understand and master

Operates a given two-fork tree and transforms it into a mirror of the source binary tree.Input Description:Image definition of binary tree: source binary tree 8 /6 x / \ 5 7 9 Mirror binary tree 8 / 6

Deep understanding of linear gradient in css3 and deep understanding of css3 gradientLinear Gradient in css3Linear gradient formula: Background-image: linear-gradient ([|]?, [, ] + ); (Angle deg or acronyms, one or more gradient color key nodes

Deep understanding of Vue conditional rendering and list rendering, deep understanding of vue I learned a lot about conditional rendering and list rendering in Vue. js over the past two days, and it is very important. So, add a little note