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Method for obtaining dynamic remaining word count in textarea based on JS

Case introduction: We often see some websites with textarea text boxes. When you enter, there are text prompts below how many words can you enter. Today is to implement this function. Of course, since a page has several textareas, it is not possible to us

2025-07-30
Detailed explanation of JavaScript deep copy (deepClone)

JavaScript deep copy is developed by beginners and even experienced, and they often encounter problems and cannot understand JavaScript deep copy very well. DeepClone? The opposite of deep copy is shallow copy. Many beginners are confused when they come i

2025-07-30
Detailed explanation of the writing and function of closures in JavaScript

1. What is a closure? A closure is a function that has permission to access variables in another function scope. Simply put, Javascript allows the use of internal functions - that is, function definitions and function expressions are located in the functi

2025-07-30
Comprehensive analysis of the switching method of tab pages

The switching method of the tab page is as follows: 1. Control the display and hide of the tab 2. The tab does not switch, and the data load controls the display and hide of the tab front-end script: 1. jquery implementation: $(function(){$(".sdkj-ta

2025-07-30
A brief discussion on the difference between addEventListener and attachEvent

addEventListener has 3 parameters, as shown below: element.addEventListener(type, listener, useCapture); Parameter parameter description element

2025-07-30
JavaScript implements simple Tip prompt box effect

This article describes the effect of implementing simple Tip prompt box in JavaScript. Share it for your reference, as follows: // JavaScript Documentdocument.write("

2025-07-30
Simple implementation code for window.open not to be intercepted (recommended)

Examples are as follows: $("#last").click(function(){var w=window.open();setTimeout(function(){w.location="//www.VeVB.COM";}, 1000);return f

2025-07-30
JavaScript goes deep into the Object Property mechanism from indexOf() of array

In JavaScript, arrays can be created using the Array constructor, or quickly created using [], which is also the preferred method. The array is a prototype inherited from the Object, and it does not have a special return value for typeof, it only returns

2025-07-30
High-performance Javascript knowledge that front-end programmers must know

I believe everyone knows that JavaScript is a full-stack development language, and JS can be seen on the browser, mobile phone, and server side. This article will share some efficient JavaScript best practices to improve your understanding of the underlyi

2025-07-30
AngularJS basic ng-class-even directive usage

AngularJS ng-class-even directive AngularJS instance is set to even rows of a table:<!DOCTYPE html><html><head><meta charset="utf-8">

2025-07-29
AngularJS basic ng-class-odd directive example

AngularJS ng-class-odd directive AngularJS instance is set to odd rows of a table:<!DOCTYPE html><html><head><meta charset="utf-8">

2025-07-29
Line chart that realizes real-time refresh based on d3.js

Let’s take a look at the source code and html file below the renderings<html><head><meta charset="utf-8"><title> Real-time refresh of line chart</title><style> .axis path, .axis li

2025-07-29
The usage and differences between front-end learning notes style, currentStyle, getComputedStyle

Introducing the difference between style, currentStyle, and getComputedStyle There are three ways to inline style sheets: they are written in the tag, and the inline style is only valid for all tags. Internal Style Sheet: Yes

2025-07-29
RequireJS usage details

RequireJS Introduction RequireJS was founded by James Burke, who is also the founder of AMD specifications. RequireJS will let you write JavaScript in a different way than usual. You will no longer use script tags to import JS files in HTML, and you will

2025-07-29
Functions for summary of basic Javascript knowledge blind spots

A function is a reusable block of code that is driven by an event or executed when it is called. This article focuses on introducing functions to you about blind spot summary of basic knowledge of js. 1. The arguments object in the function has an argumen

2025-07-29

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