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node.js link database 1. Premise The computer has node installed. You can use the win+R key, enter cmd, and then enter node -v to check the version; Then enter npm -V to check the installed version of npm After all the above, create an empty folder named projects, which creates three empty folders: JQ, HTML and API In the jq folder, impo ...

Technical work should be rewarded follow+Click three times (like, comment, collect) and watch again to form a good habit hutool actual combat (take you to master various tools inside) directory Purpose: File tool class (common operation of files) Usage scenario Provide common operation methods for more than 100 files, including but not li ...

summary The data of the Web application will be stored on the cloud side, and the data will not be cached locally. During data management, you will directly operate cloud side data. The Web SDK will guarantee the communication and communication security between your application and cloud database. This sample application demonstrates how to q ...

JS advanced part judgeObject reference typeResearch on undefined and nullDistinguish between variable types and data typesData, variables and memoryjs function parameters are passed as valuesHow does JS engine manage memoryJS object When to use ['attribute name'] and when to use it JS function object The difference between call and apply ...

Article reference https://www.w3school.com.cn/js/js_object_definition.asp JavaScript object definition In js, almost everything is an object: Booleans are objects (if defined with the new keyword) Numbers are objects (if defined with the new keyword) A string is an object (if defined with the new keyword) Dates are always objects Arithm ...

Article catalogue preface1, Simple implementation of page 1. Login page2. Registration page3. Home page (display personal information) 2, Logical implementation 1. Use of localstorage2. Function realization Sign inregisterhomepageRouting profile summary preface This article mainly explains how to use vue to realize the j ...

brief introductionFrom implementing the basic architecture of the project - > supporting multi specification packaging - > implementing on-demand loading - > publishing npm packages, take you to build component libraries from 0 to 1.Construction projectInitialize project directorymkdir lyn-comp-lib && cd lyn-comp-lib && ...

preface Years ago, I made a project similar to user portrait, which has independent functions and may be embedded by many projects as a functional module, so I naturally thought of making this project into a component output. Vue cli provides Library packaging mode Therefore, I only need to copy the packaged files to other projects after each d ...

1, Official website https://www.npmjs.com/ The software package can be found here. If you want to download a software package, you can first search on the official website, then copy the name and install 2, Common commands 1,npm init -y xinxizhongxin-lijin:npm-study lijin$ npm init -y Wrote to /Users/lijin/Desktop/npm-study/package.json: ...

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 f ...