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CSS realizes various methods of horizontal, vertical and horizontal centering of box model CSS method for realizing horizontal centering of box model Global style .parent { color: #FFFFFF; height: 200px; width: 200px; margin: 0 auto; background-color: #000000; } .child { width: 50px; height: 50px; background-color: #26f12d; } First ...

1, Form supplement 1.textarea label Defines a multiline text input control The text area can accommodate an unlimited number of text. The default font of the text is equal width font. You can specify the size of textarea through the cols (width, number of columns) and rows (number of rows) attributes, but a better way is to use the height an ...

Introduction to this articleI listed three in fabric JS to replace the picture.It also includes the operation of changing pictures in the group.Environment and versionChrome browser version: 96.0.4664.45Fabric.js version: 4.6.0I developed it in the native environment, and also provided a code developed in Vue3 environment (there is a link at th ...

E-commerce background management system - authority management module The authority management module of the e-commerce background management system is divided into two parts: role list and authority list. The flow chart of the two parts is roughly as follows 1. Implementation process of permission list Create routing component, configure ...

Knowledge Prospect: suppose you know vue3 the knowledge about setup in composite API. If you are just beginning to study, you can have a look Official documents , or My article. In vue3, there are two important APIs - ref and reactive. If you don't understand the principles of these two APIs, it can be said that you haven't learned vue3 wel ...

1.DOM DOM is the interface for JavaScript to operate web pages, and its full name is "Document Object Model". Its function is to turn the web page into a JavaScript object, so that you can use scripts for various operations (such as adding and deleting content). node The smallest component of DOM is called node. The tree structure ...

This article is original by the author. I summarize, review and share my experience. Please correct me Installation of routingRoute creation componentRouting is simple to useGlobal front guardRoute nesting useother 1. Installation of routing Referring to the official documents of Vue router, we can see that there are methods of direct do ...

Later, there are cases. Through the cases, the four stages and eight hook functions contained in the Vue life cycle are analyzed in turn. 1. What is the Vue life cycle? Vue life cycle refers to the process from the beginning of creation to destruction of Vue instance objects. All functions of Vue are implemented around its life cycle. Corresp ...

Vue learning series - 05 - most detailed learning process (full of dry goods) preface 04 - Portal This chapter will advance to a new chapter! Start with componentization We all know that the rainbow can't be seen until the wind and rain. But we all hope to sit directly in the rainbow. Others have arranged a beautiful world for y ...

1. Events 1. What is an event [explanation]: an event is an action or event that occurs in the system during programming. 2. What is event listening [explanation]: it is to let the program detect whether an event occurs. Once an event is triggered, it will immediately call a function to respond, which is also called registration event. [sy ...