Programmer Group

1. Structural elements 1.1 related concepts of document structure elements 1.1.1header element The header element is a structural element that represents the header. It is usually used to place the title of the whole web page or a content block in the page, but it can also contain other elements, such as title (< H1 > ~ < H6 &gt ...

Introduction:   A server configuration block is an Nginx instruction, which defines the settings for a specified domain name and allows you to run multiple websites on a single server. For each website, you can set the root directory of website files (the directory containing website files), create an independent security policy, use diffe ...

         It is recommended that front-end developers use ES6 for development, which can reduce the amount of code and increase readability. 1. About value 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.c; const d = obj.d; c ...

Component communication props Applicable to parent-child component communication Parent component - > child component The parent component passes the parameters to be passed to the child component through key={xxx}, and the child component obtains the parameters through this.props.key import React from 'react' import Son from './son' cla ...

1 case description Using JavaScript, css and html to make a simple message board can also be regarded as a simple comment area. It is required to enter some text in the page text box, click the "publish" button to display the entered text below, re-enter some text, and then click publish to display the newly published content at ...

This article introduces several new functions for unicode strings in ES6.String.prototype.codePointAtFunction type:(index?: number)=> number|undefinedcodePointAt is a prototype function that returns the code point value of the character in the string according to the passed in index parameter. This method can recognize 4-byte code points in ...

statement The statute draws entirely on this big man Collated content , I read it through 4 or 5 times. Personally, I feel that it is very good and comprehensive. But there are also some spelling and logic problems. On this basis, I made some corrections. Follow up meeting 2.2.4 notes Supplement the standard note format. Front end code sp ...

Advantages of TypeScript Support ES6 specificationPowerful IDE supportAngular2 development language IDE advantages Type check Typescript online complier http://www.typescriptlang.org/play/index.html Typescript local complier Install node.js, npm npm install typescripttsc --version New string features Multiline string``    ...

JavaScript data structure and algorithm (IV) queue Cognitive queue Queue is a linear table with limited operation. Its feature is first in first out. (FIFO: First In First Out) Limitations: Deletion is only allowed at the front of the table.Insert operations are only allowed at the back end (rear) of the table. Scenes similar to queue stru ...

Redux learning notes There is no necessary relationship between redux and react. redux can be applied to various frameworks, including jquery and even js. However, redux and react are more matched. redux also launched react redux, which is specially used for react. 1. Overview of Redux Redux is a JavaScript container for global state managem ...