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HMR hot module replacement / module hot replacement Function: when a module changes, it will only update the module (not package all) to improve the speed Style file: you can use the HRM function because the style loader is implemented internally js file: no HRM by default html file: there is no HRM by defau lt, and the html file cannot be ...

JS array traversal is basically for,forin,foreach,forof,map and other methods. The following describes several array traversal methods used in this analysis and performance analysis and comparison The first is a normal for loop The code is as follows: for(j = 0; j < arr.length; j++) { } Brief description: the simplest one is also the ...

Usually, during the project process, the data returned by the api you need may not be completed at the back end, but only documents. At this time, you need to use mock to intercept ajax requests, generate random data, and complete the data rendering of the page There are different deployment schemes for mock.js, so I won't list them one by one ...

preface Over the past few years, I have been struggling in the it industry. Along the way, many have summarized some high-frequency interviews in the python industry. I see most of the new blood in the industry, and I still have all kinds of difficult questions for the answers to all kinds of interview questions or collection Therefore, I dev ...

1. Download the toolkit Redux, react Redux and Redux saga in the project  yarn add redux  yarn add react-redux  yarn add redux-saga 2. Create Redux folder and corresponding directory in src directory 3. Introduce createStore in store.js Create store: call the createStore() method to get the store. The parameter passed in the method is a ...

For more articles, please pay attention to WeChat Public Number: Front End css and js Dry Have you ever felt this way when reading js code? You hardly understand what the code means? Does the code use a lot of outdated JavaScript techniques? Naming and coding style more casual? These are signs of bad coding habits. This article lists fi ...

Please indicate the source of Reprint: the official website of grape City, which provides professional development tools, solutions and services for developers to empower developers. Original source: https://blog.bitsrc.io/understanding-generics-in-typescript-1c041dc37569 What will you learn in this article This article introduces the con ...

Component communication between parent and child components Interview question: what are the communication modes between vue components? The first: props+this.$emit: props: Parent component A binds data through v-bind and transfers data to child components, which are received by props Parent component A: <template> <div class ...

ES6 is recommended for program optimization and aesthetics. (All javaScript syntax after ES5 is collectively referred to as ES6) 1. About Value Selection Values are common in programs, such as obj from an object. const obj = { a:1, b:2, c:3, d:4, e:5, } Make complaints: const a = obj.a; const b = obj.b; const c = obj. ...

Author: deathmoodTranslator: front end XiaozhiSource: mediumThere are dreams and dry goods. Wechat search [Daqian world] pays attention to this bowl washing wisdom who is still washing dishes in the early morning.This article GitHub https://github.com/qq449245884/xiaozhi It has been included. There are complete test sites, materials and my ser ...