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Welcome to learn and communicate!!! Updating continuously 1. Data broker Object in ES6 Defineproperty method object. The defineproperty method is the syntax in ES6 and needs to be reviewed to better understand the data binding in Vue. case let number = 18 let person = { name:'Zhang San', sex:'male', } Object.defineProperty( ...

1, Short circuit assignment Principle: || seeing the truth in the operation is the real short circuit For example: var a = B | C If b is true, the value of b will be paid to a; If b is false, assign the value of c to a *Note: the following values in js will be converted to false: false,undefined,null,0,NaN," ",' ' 2, Scope of variable ...

JavaScript from getting started to mastering video through train:         [1-200] JavaScript video tutorial, from introduction to mastery, with more cases of practice, easy to understand!         [201-300] JavaScript video tutorial, from introduction to mastery, with more cases of practice, easy to understand! JavaScript process control stat ...

In camunda, the script task is an automatic activity. When the process executes the script task, the relevant script is automatically executed. Camunda supports mostly JSR-223 compatible script engine implementations, such as Groovy, JavaScript, JRuby and Jython. This paper focuses on the description of the script engine based on JavaScript, ...

JS array de duplication methodExample: remove duplicate elements from the following array (take multiple data types as an example)const arr = [1, 2, 2, 'abc', 'abc', true, true, false, false, undefined, undefined, NaN, NaN]1. Use set() + array from()Set object: a collection of values. You can iterate its elements in the order of insertion. The ...

JavaScript detailed learning notes 3 1. Web APIs 1.1 basic relevance between web APIs and JS 1.1. 1. Composition of JS ECMAScript: Javascript syntax ----- fundamentals of JavaScriptDOM: page document object model ---- Web APIsBOM: browser object model ---- Web APIs 1.1. 2. JS foundation stage and Web APIs stage [the external chain image t ...

Addition, deletion, modification and query of role list 1. Add role First, write the interface according to the API document; // Add role export const addRolesApi = (data) => { return axios({ method: 'post', url: 'roles', data }) } Reference in the role component, and then bind a click event addRolesClick to the "add ...

What is WebP? WebP is a picture file format that provides both lossy compression and lossless compression. The size of the picture can be greatly compressed, and the quality of the picture is the same as png, jpeg, etc. The lossless compression of WebP is on average 45% smaller than png format files. Here are the test results of comparing the ...

react source code analysis 17 context Video Explanation (efficient learning): Enter learning Previous articles: 1. Introduction and interview questions 2. Design concept of react 3.react source code architecture 4. Source directory structure and debugging 5. JSX & Core api 6.legacy and concurrent mode entry functions 7.Fiber archit ...

Author: Dmitri pavlutinTranslator: front end XiaozhiSource: dmitripavlutinThere 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, materi ...