JavaScript

JavaScript, a function in JS, the first sentence var _this = This; Why do you do this? Here is the source code:1 The following code is a common site home page, automatically switch span or Tabbar to change the list display content of the key method:2

1.JavaScript errors-throw, try, and catchThe try statement tests the code block for errors.The catch statement handles the error.The throw statement creates a custom error.1.1 JavaScript ErrorVarious errors occur when the JavaScript engine executes

JS Basic Concept JS operator JS Basic statement JS Array Usage Date usage JS string usage JS Programming Style JS Programming Practice Unknowingly do the front end has been more than five years, whether from the

About the solution to Webpack dev server hot loading failure, webpackdev When the Webpack dev server is used as the server for hot loading, the following error occurs: XMLHttpRequest cannot load

NodeJS simple WebSocket function example, nodejswebsocket The example in this article describes the simple WebSocket function of NodeJS. We will share this with you for your reference. The details are as follows: Based onExpressAndSocket. ioFirst,

Complete example of text intermittent loop rolling effect implemented by JS, intermittent js This article describes the intermittent text scrolling effect implemented by JS. We will share this with you for your reference. The details are as follows:

BOM application in JS and JSBOM Application We have mentioned that JS consists of three parts: BOM, which is used to operate browsers. In this lesson, we will mainly introduce BOM. BOM Basics Let's take a look at the basic function of BOM: open and

Detailed instructions on the use of the mini-program radio component and radio usage This article shares the usage of the mini-program radio component for your reference. The specific content is as follows: WXML {{item.value}}

The applet implements the folding panel and the applet folds the panel. The examples in this article share the code of the small program MUI folding panel for your reference. The details are as follows: Implementation Principle By controlling the

Use SVG in React and Vue projects, vuesvg Some modern flat design websites, especially mobile websites, often contain many simple and clear small icons, for example, the website icon, the user's default avatar, and the fixed switch bar at the bottom

Angular uses trackBy to Improve the Performance, angulartrackby When traversing a collection in an Angular template, you will write as follows: {{item.id}} Sometimes you need to change this set, for example, returning new data from the backend

Example of table merging cells implemented by Bootstrap, bootstrap Cells This example describes how to merge cells in a table implemented by Bootstrap. We will share this with you for your reference. The details are as follows: 1. Problem background

JS implements Baidu search interface and link function instance code, js Baidu search This article describes how to implement Baidu search interface and link functions in JavaScript code. The specific code is as follows: In the previous article, I

Full explanation of html-webpack-plugin usage, Html-webpack-plugin: this plug-in is used for webpack children's shoes that may have been used, even if it has never been used. When learning webpack, we may often see such a piece of code. //

Example of the image upload function of a applet (front-end + PHP backend ), Preface Images are used in almost every program. Next we will introduce you to the front-end + PHP backend Implementation of the applet to implement the image upload

Use async-validator to compile the Form component, In front-end development, Form verification is a common function. Some ui libraries such as ant. design and Element ui both implement Form components with verification functions. Async-validator is

Examples of CSS transition effect of web Front-end vue, web Front-end vuecss The importance of transition effect in interactive experience is self-evident. In the past, we used js or Jquery to add or remove elements of classes, combined with the

When js clicks, the menu method beyond the drop-down menu of this range is disabled. The js drop-down menu Example: $ (Function () {$ (document ). bind ("click", function (e) {// If the id is menu, the menu if(items (e.tar get ). closest ("# menu "

Released and used based on react backend rendering template engine noox, reactnoox The concept of React componentization has attracted more and more developers' attention. componentization helps developers decouple pages into one component, and the

Vue-based website front-end permission management (frontend and backend separation practices) and vue permission management As a popular language, Javascript is widely used. It can be seen everywhere from the front-end to the back-end, this