JavaScript

Method One://An extension to date that converts date to a string of the specified format//the Month (m), Day (d), hour (h), Minute (m), second (s), quarter (q) can be used with 1-2 placeholders,//year (Y) can use 1-4 placeholders, milliseconds (S)

DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Statementtitle> Script> varI= 9;//Modifying the I value if(i> Ten) {document.write ("I'm more than ten"+""); } Else if(i Ten) {document.write ("I'm less than ten"+""

1 //VI: Object-oriented Programming2 //What is an object: "A collection of unordered attributes, they can contain basic values, objects, or functions", strictly speaking, is equivalent to a set of values that have no particular order, each object

1 //Inheritance: ECMAScript only supports implementing inheritance by relying on the prototype chain to implement2 //first, the prototype chain3 //first to clarify the relationship:4 //Each constructor will have a prototype object person---prototype5

DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Exception handlingtitle> Script> functionDemo () {Try{alert (str);//Str is empty }Catch(ERR) {alert (ERR); }} demo (); functiondemo1 ()

The scope of JavaScript is mainly refers to the scope of the function, in the determination of the results of the time is very important, if not clear scope, it is likely to lead to not get the expected results, it will not be able to successfully

1. Use typeof bar=== "Object" to determine if bar is a potential trap for an object? How to avoid this trap?Cases:var bar=null;Console.log (typeof bar=== "Object");Output result: true;Explanation: null is considered an object in JavaScriptIf you

The composition of the cookie:A cookie consists of the following parts:1. Name2. Value3. Other attributes (max-age, path, domain, secure) Max-age:cookie the presence of a second tree, max-age=1000, that is, this cookie will be deleted after

I. The relationship between objects and functions1. An object is a function creation, and a function is an object.2. How objects are createdThe 2.1.Object constructor creates an object, new objects ();2.2. The literal creation of the object var x =

/*Hero Machine: Because the hero machine only one, so do not need to use the constructor*/varHero = { //Initial pictureSelfNULL, //Initial Leftleft:0, //Initial Toptop:0, //Health ValueLife:3, //Images loaded in and explodedimgs:['

Tag: CER numeric copy plain copy blog is not built using arraysCommon methods for JavaScript arraysOne, array creation1. (1) Create an array using array:1 var arr1 = new Array ();//Create an empty array 2 var arr2 = new Array (10);//Create an array

the events in JSI. Classification of events:Mouse events: mouse clicks, mouse double-click, mouse refers to the upper ...HTML Events: Document loading, focus, form submission, etc...Keyboard events: Keyboard pressed (KeyDown), keyboard pressed and

1. Introduction 1.1 DescriptionAn array is an ordered collection of values. Each value is called an element, and each element has a position in the array, represented by a number, called an index. JavaScript arrays are untyped: array elements can be

Prepare two objects for the following discussionvar Alice = {Name: "Alice",Tostring:function () {return this.name;}}var Smith = {Name: "Smith",Tostring:function () {return this.name;}}in JavaScript, && is not just for a Boolean type, but for the

First type: Alert () methodSecond type: Confirm () methodReturns a Boolean value that can be used to perform the action, depending on the value returned.The third type: Prompt () methodReturns the input message, or its default value hint box, which

Name: Password: Gender: Male FemaleHobbies: Eat Drink SleepAvatar: Origin:-Please select- Heilongjiang Jilin Liaoning Henan -Please select-Self Introduction:good!-JavaScript implements provincial and municipal linkage

Basic grammarFirst, what is JavaScript? What are the features of the JavaScript language? What are the characteristics of scripting languages?1, if the CSS is to HTML page make-up decoration to make the HTML page more beautiful, then JavaScript is

There are 3 ways in which the splice () method works in javascript:Delete--You can delete any number of items, just specify 2 parameters: the location of the first item to delete and the number of items to delete.For example, splice (0,2) deletes

Cookies and sessions are common information storage methods in Web development. A cookie is a place on the client that can store user information. A session is a place where user information is stored in server memory. JavaScript is a script that

what is a regular expression (Regular expreSSion)A regular expression is an object that describes the character pattern.Can handle more complex strings　　Regular Expressions in JavaScript use the RegExp Object RepresentationRegular expressions are