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1, Basic introduction to hyperlinks 2, External resource links 3, Internal resource links 4, Precautions 5, Expand data 1, Basic introduction to hyperlinks Creating a hyperlink in HTML is very simple. You just need a tag to surround the object to be linked. The target of the hyperlink can be a website, a picture, a pdf file or a video. It ...

Node.js is a JavaScript running environment based on Chrome V8 engine, which is usually used to create web applications. It can handle multiple connections simultaneously and is not thread dependent like most other models. For Web developers, the scenario of obtaining data from a database or Web server and then outputting it to an Excel file fo ...

In recent projects Ant Design There are a lot of connections, which is very good. i don't know if you have found such an effect. On the official website, if you put the mouse on the Logo, the icon on the letter i will change constantly. After leaving, it will stop and change again. It can be regarded as a small colored egg (maybe i didn't find ...

catalogue Promise object Synchronous asynchronous in Promise Using Promise to resolve callback hell Promise package Third party then FS solution callback hell async and await keywords async keyword await keyword async and await resolve callback hell 4. async and await read JSON file cases Promise object An object added in ES6 is ma ...

In css, elements cannot be selected forward, that is, parent elements or former sibling elements cannot be selected; This is subject to DOM rendering rules; In fact, html is a rendering mechanism from the outer layer to the inner layer; If you can render up, there will be problems such as rendering disorder and performance; Change the position ...

Why use CDN When more and more components are introduced, use the app packaged by webpack JS file is easy to become too large, which is very unfriendly to the first screen loading. The JS code using the third-party resources of CDN will no longer be packaged into the JS package of local services. Reduce the volume of local JS package and imp ...

Cross document messaging, Cross worker messaging, channel messaging MessageEvent Message event MessageEvent() be used for: Cross document messaging (see Window.postMessage() And window onmessage).Channel messaging (see MessagePort.postMessage() (en-US) and MessagePort.onmessage).Cross worker / document messaging (see the above two entries, a ...

When we are working on the background management system, we will all involve the problem of how to dynamically display the menu tree on the left side of the system. At present, they are basically RBAC solutions, that is, Role-Based Access Control. Permissions are associated with roles. Users get the permissions of these roles by becoming member ...

JavaScript JavaScript is a programming language that provides dynamic interaction features for websites. Bring js file into the page 1. Create a new folder scripts 2. Create a new file main JS file let myHeading = document.querySelector('h1'); myHeading.textContent='Hello World!'; 3. Page import js file The position is between the lab ...

html2.0 learning notes I html advanced Tags 1. The HTML encoding format is &; There are three common: 1) Spaces, & nbsp; 2)<，&lt； 3)>，&gt； 2. < br > Enter (line feed) 3. < HR > horizontal line 4. Ordered list labels Basic format: <ol> <li></li> ... <li></li> </ol ...