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Regular expressions (recommended by syntax)

Construct summary of regular expressions construct matching character x character x // backslash character /0n Character n with octal value 0 (0 <= n <= 7) /0nn Character nn with octal value 0 (0 <= n <= 7) /0mnn Character nn with octal value

2025-07-10
js method of recording guest names based on cookies

This article example describes the method of recording guest names based on cookies by JS. Share it for your reference, as follows:

2025-07-10
EasyUI displays after loading the HTML content style rendering

Wait for the page's css style to load, the Html content is loaded, and then display it after the style is generated, avoiding the adverse visual effects caused by gradually rendering the style after the content is loaded at the beginning, and enhancin

2025-07-10
A brief analysis of JS prototype inheritance and class inheritance

Let's first look at the inheritance of JS classes<!DOCTYPE html><html><head><meta charset="UTF-8"><title> Inheritance of JS class</title></head><body> /* -- Classical inheritance -- */

2025-07-10
js write a simple product enlargement effect code

There is often a product display area on the product page of the shopping website. One function in this picture area is the magnification function of the product picture. Move the focus area on the left to enlarge the details and view the details. The det

2025-07-10
A simple summernote image upload case that does not report errors

A relatively complete summernote case for uploading pictures, there is no background (there are too many cases of uploading pictures online), only front-end js. The code provided online but with bugs is fixed. In this example, js guarantees no errors. Per

2025-07-10
Implementing the linkage selection of birthday dates based on javascript bootstrap

This article shares the relevant code for JS to implement date linkage selection, which is suitable for birthday selection for your reference. The specific content is as follows to achieve the goal: three select input boxes for year, month and day, and a

2025-07-10
Implementation method for removing duplicate elements of array in javascript [Example]

In practical applications, we may often need to remove duplicate elements in the array. The following is the implementation of JavaScript array deduplication: <script language="javascript"><!--/*判断数组中是否存在某个元素的方法*/function isEx

2025-07-10
Implementing carousel diagram code based on JavaScript

1. Key points: 1. When the page is loaded, the pictures overlap and overlap [absolute positioning]; 2. The first picture is displayed, others are hidden; 3. Set the subscript and set the color of the subscript to move with the picture; 4. Move the mouse t

2025-07-10
Simple example of JS determining whether the date format is legal

Similar to Checkdate in PHP. //Function name: CheckDateTime//Function introduction: Check whether it is a date time function CheckDateTime(str){var reg = /^(/d+)-(/d{1,2})-(/d{1,2}) (

2025-07-10
JavaScript data binding implements a simple MVVM library

Recommended reading: Implementing very simple js bidirectional data binding MVVM is a very popular development model for the web front-end. Using MVVM can make our code focus more on dealing with business logic rather than caring about DOM operations. Cur

2025-07-10
Example code that uses native JS to simply encapsulate AJAX

First, we need the xhr object. This is not difficult for us, encapsulating it into a function. var createAjax = function() { var xhr = null; try { //IE series browser xhr = new ActiveXObject("mic

2025-07-10
JS passes object array as parameters to the backend, the instance code obtained by the backend

Front-end JS code: var conditionons = []; var test1 = new Object(); test1.name="1"; test1.id="2"; var test2 = new Object(); test2

2025-07-10
How to prevent SQL injection by JS code (super simple)

The following is a method to prevent SQL injection of JS code from two aspects. It is very simple and practical. Interested friends can refer to it! 1. URL address anti-injection://filter URL illegal SQL characters var sUrl=location.search.toLowerCase();v

2025-07-10
How to automatically review team codes

Preface In team development, whether it is writing front-end (js, css, html) or back-end, we often need to solve a problem: how to unify the team's code style. This article mainly uses pre-git, eslint, and js-beautify to implement code style control.

2025-07-10

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