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Brief summary of prototype and constructor in JavaScript

1. The constructorConstructor value is a function. In JavaScript, values, arrays, functions and objects of types except null and undefined have a constructor attribute. The value of the constructor attribute is this value, array, and function.

2025-03-17
JS implementation of replication is compatible with chrome and IE

IE js code: The copy code code is as follows:<script type="text/javascript"> function copyUrl2() { var Url2=document.getElementById("biao1"); Url2

2025-03-17
JavaScript's Strict mode and with keyword introduction

In December 2009, ECMAScript released ECMAScript 5, which has been released for the last version of the ECMAScript 3 standard. Although JavaScript has been in Web programming, ECMAScript 4 is eventually eventually eventually eventually due to major manufa

2025-03-17
Today’s most popular JavaScript code specifications

What are the best programming practices for JavaScript coding? This may be a difficult question to answer. So, let’s change the question, what coding standards are the most popular? Sideeffect.kr came up with some interesting results by analyzing open sou

2025-03-17
websocket+sockjs+stompjs detailed explanation and example code

Recently, there was a project requirement to use websocket. I thought it was very simple at first, but as I encountered problems and learned more about it, I realized that websocket is not as simple as imagined. This article mainly considers the use of we

2025-03-16
Figure out the drag and drop of html5 in 5 minutes (summary)

It takes 5 minutes to figure out the drag and drop of html5, as well as the order of other monitoring events and execution. Definition and Usage The following events are triggered during the drag and drop process: Events are triggered on the drag target (

2025-03-16
JS timer use (instance explanation)

In JavaScritP, there are two special functions about timer, which are: 1. Countdown timer: Timename = Settimeout ("Function ();", Delaytime); 2. Cycles: Timename = SetInterval ("Functi

2025-03-16
Sample code for parent node to obtain strings of child nodes

1. JavaScript method: document.getElementById("id").innerHTML; (1) The example description copy code is as follows:

2025-03-16
After the login is successful, the number of seconds is automatically calculated to execute the jump

Login.html Copy code code as follows:<script language = "javascript" type = "text/javascript"> function $(id){ return document.getElemen

2025-03-16
JavaScript gets XML data with sample screenshots

Hot.xml file: Copy the code as follows:<?xml version="1.0" encoding="gb2312"?><root><item><name> Liu Yifei</name><url> MingXing/LiuYiFei.htm

2025-03-16
Detailed discussion of Array array object in Javascript

First, the definition of the array and the method of initialization: var myArray = new Array(1,3.1415,"love"); //Note here that the elements in the myArray array are not just elements of the same data type, they can be integer or floating point

2025-03-16
Introduction to hiding controls and using display attributes in js

There are two ways to hide controls using JavaScript, one is by setting the "display" and "visibility" attributes of the control's style. When style.display="block" or style.visibility="visible" the control is v

2025-03-16
Analysis of floating -point operation problems in JS

How is the floating -point type in JS? For example: VAR A = 0.69; I want to get 6.9 directly to write VAR C = A*10; Alert (C); the result is: 6.899999999999995 to search online, some netizens said that this is a JS floating -point calculation bug, and fou

2025-03-16
JS date, constellation level joint display code

JS code replication code code is as follows: Function BirthdayonChange (obj) {var Year = $ (<%= ddl_year.clientid%> "). Value; ifar ==" year ");

2025-03-16
JS operation CSS randomly changes the web page background implementation idea

Today, a friend asked me on weibo if I can use JS and CSS to make the page refresh randomly produce a background image every time I refresh it. Of course, my answer is OK. You can do this specifically: 1. Use JS to define an image array, which stores the

2025-03-16

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