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Get elements document.getElementById('parameter '); Get id element console.dir(time)； Print element objects document.getElementsByTagName('tagname '); Get elements with tags var nav = document.getElementById('id name '); var nav1 = nav.getElementsByTagName('tagname '); You can get some labels i ...

Problem analysis of this record: 1. Time difference problem: When I click alert, I clear and focus the input box, but the moment I click alert, the focus is not on the input box, and the defocus event is triggered, resulting in the alert pop-up. 2. Sequence question: With the mentality of first letting it pop up in the execution of clearing and ...

Basic configuration of React project and solution of common pit 1, Create React project # Global scaffold installation npm install create-react-app -g --save # Create React project create-react-app my-app 2, Implement the loading of Less file 1. Expose profile # Expose the project's profile npm run eject Directory structure after profile e ...

concept For the current common "one-page application", the advantage is that the front-end can handle more complex data models in a more comfortable way, while transforming based on the data model for better interaction. Behind good interaction is a model that corresponds to the state of a page component, which is arbitrarily called ...

Now that front-end pages are becoming more and more effective, the default input component style obviously does not meet the design requirements.A few years ago, development projects happened to meet the related requirements, and in this particular collation, modify the methods of radio, CheckBox, style. Principle: The general principle i ...

Send native Ajax request based on Promise // Send native Ajax request based on Promise function queryData(url) { //resolve successful callback function reject failed callback function var p = new Promise(function(resolve, reject){ var xhr = new XMLHttpRequest(); xhr.onreadystatechange = function(){ ...

1, Main documents React React Router Ant design TypeScript Redux 2, Start using and experience react scaffold npx create-react-app react-app-demo cd react-app-demo yarn start 3, Follow the document Rendering an element ReactDOM.render(<h1>Hello, world!</h1>, document.getElementById('root')); Use of rendering JSX const name = ...

The process is that the user enters the module page after logging in, clicks on different modules, and enters the menu page (different modules, different menu contents) Problems encountered 1. The menu data is stored in the store and the page is blank after refreshing Solution: initialize the menu every time in the global navigation guard ...

Preface In recent years, with the discovery of gravitational waves, the photography of black holes, the discovery of evidence of water on Mars, and the dissemination and popularization of literary and television works such as Trisomy, Wandering the Earth, Star Trek, etc., those things in space that are far away from us are getting closer and cl ...

>WeChat Public Number: Dotnet9 , Website: Dotnet9 , questions or suggestions: Please leave a message on the website， If it helps you: Welcome Appreciation. Simple Music Player Main Interface Design -.NET CORE(C#) WPF Development Reading Navigation Background of this article code implementation Reference for this article Source code 1. Ba ...