Programmer Group

To store multiple elements, array is the most commonly used data structure, but array also has many disadvantages: The creation of an array usually requires a continuous memory space, and the size is fixed. Therefore, when the current array cannot meet the capacity requirements, it needs to be expanded (usually apply for a larger array, an ...

Hook rule Use Hook only at the top Do not call Hook in loops, conditions, or nested functions to ensure that they are always invoked at the top level of your React function. By following this rule, you can ensure that hooks are called in the same order in each rendering. This allows react to maintain the correct hook state between multipl ...

WeChat official account: brother K crawler, QQ exchange group: 808574309, keep sharing crawler advance, JS/ Android reverse technology dry cargo! statement All contents in this article are for learning and communication only. The packet capturing content, sensitive website and data interface have been desensitized. It is strictly prohi ...

Once there is order in js, you have to use an array ([]) to store it Everyone in the array is an object ({}) Everyone must have a unique ID Vue.config.productionTip = false const vm = new Vue({ el: '#root', data(){ return{ persons: [ {id: '001',name:'Zhang San',age: 18}, {id: '002',n ...

1. Layout design effect of left menu   2. Left Menu Layout Analysis Menus are split into two levels and have a folding effect   3. Introduction to menu components used   Menu | Element Plus (gitee.io)   el-menu   The outermost layer of the entire left menu must be wrapped in a menu  el-submenu Level 1 Menu ...

Engineering OverviewAll means aimed at improving efficiency, reducing cost and quality assurance belong to engineeringCreate projectCreate project structure with scaffolding toolscodeformatting code Compile, build, packagePreview / testWeb Server/MockHMRSource MapSubmitGit HooksContinuous integrationdeployCI/CDAuto publishScaffolding toolsEssen ...

        Many people's first reaction when they see regular expressions is that they have a big head and are difficult to learn. They have such a long string of symbols. What is this. Ah! Don't worry. In fact, regular expressions are easy to understand step by step. Don't believe it? Look! catalogue 1, What is a regular e ...

The traditional hybrid mobile App development model usually uses WebView as the bridge layer. However, with the increasingly strict audit policies of iOS and Android App stores, it is sometimes wrongly judged that simple web pages are packaged into apps, which are easy to be rejected on the shelf. Since there may be risks, we can render in othe ...

First of all, it must be said that the direction of this is indeterminate when the function is defined. Only when the function is executed can it be determined who this is pointing to. In fact, this ultimately points to the object that called it. (There are some problems with this sentence, which will be explained later. Although most articles ...

elementUI framework learning notes 1. Create a Vue cli scaffold Initialization: vue init webpackInstallation package: npm installInstalling elementui: NPM I element UI - SInstall axios: npm install axios -SInstall Router: NPM install Vue router - s and configure routing.Introduce components and configure routing.Start project: npm run dev ...