websocket react

First, download Axios pluginYarn Add Axios　　Ii. how the AJAX request code for react is placedRecommended placement in the Componentdidmount () of the life cycle functionThird, the Ajax GET request Axios.get (' url ') . Then (() =>{ //Success alert (' success '); }) . catch (() =>{ //Failed alert (' false '); })Parse: The Url,then is the callback function that th

Since React-router routes is components, creating nested routes is as simple as making one route a child of another in JS X.Make the nested component:class App extends React.component { render () { return( "/" component={home}> " About " component={about}> "Contact" component={ contact}> );} }Change the path:ConstLinks = () = 'Green'}} to="/">Home'Green'}} to="/about">About"Acti

The Redirect component in React-router does exactly what it sounds like. It allows us to redirect from the one route to another.Import React from ' React 'Import {hashhistory, Route, Redirect, Router, Link} from' React-router '; Const Home= () = Const Links= () = class App extends React.component {render () {return(

Detailed explanation of how react obtains Routing Parameters in components, detailed explanation of react component Routing Route Parameters If we have a lot of list pages, these pages have different dynamic content and other page parts are the same, how do we configure routes and components at this time? In this scenario, you need to use the routing Parameter Function to add a route configuration contai

React Native and Angular+ionic are the hottest hybrid app development languages on the web, and they're powerful enough to develop Android and iOS programs!------------------Course Catalogue------------------├│├01-react Native Introduction. mp4│├02-react native environment building. mp4│├03-react native first experienc

NPM init-generate a Package.json file Install dependent NPM install–save react npm install–save react-dom npm install–save-dev webpack npm install–save-dev webpack-dev-s erver npm install–save-dev babel-core npm install–save babel-polyfill npm install–save-dev babel-loader npm Install–sa Ve-dev style-loader css-loader npm install–save-dev file-loader npm install–save babel-runtime npm Install–save-dev Bab E

JSX is not a new development language, but a syntax proposed by Facebook: A syntactic sugar that allows you to directly write HTML tags in JavaScript code. Therefore, JSX is essentially a JavaScript language. TIPS: syntaxes (Syntactic sugar) is by British computing scientist Peter randing (https://zh.wikipedia.org/wiki/% E5 % BD % BC % E5 % BE % 97% C2 % B7 % E5 % 85% B0 % E4 % B8 % 81) A term invented is a syntax added to a computer language. This syntax does not affect the functions of the lan

JSX is not a new development language, but a syntax scheme that Facebook proposes: a syntactic sugar that can write HTML tags directly in JavaScript code, so JSX is essentially a JavaScript language. Tip: syntax sugar (syntactic sugar) is by the British computational scientist Peter Landing (https://zh.wikipedia.org/wiki/%E5%BD%BC%E5%BE%97%C2%B7%E5%85%B0%E4%B8% 81) The invention of a term, refers to a computer language added to a grammar, which has no effect on the function of the langu

React's JSX uses large, lowercase conventions to differentiate the classes and HTML tags of local components. Renders the local react component requires a label name that starts with an uppercase letter, which renders the HTML tag with the name of a label that begins with lowercase letters Attention: Because JSX is JavaScript, some identifiers class are like and for are not recommended as XML attribute names. As an alternative, the

1. Installation process$CNPM install-g-create-react-app$create-react-app Apps$CD apps/$NPM start2. Picture pathCannot use relative path Can be used or import logo from "./logo.svg"2.class problem element class with Classname= "NAV" 3. Resources we put a picture in public, we will find the address of the http://localhost:3000/02.jpg can find our designated image. Illustrates that

Summary: In react, the data can be streamed from top to bottom, and whenever you use a component, you can see that the props property of the component is passed from top to bottom. However, in some cases, we do not want to pass through the parent component's props property one level down, and we want to get the value in the props of the parent component of the upper n level directly in a sub-component. 1. In general, through the props of the value of

The text component is a basic component in react, similar to the TextView component in Android, to display basic text information, which, in addition to the basic display layout, can be nested, set styles, and can do events (for example, click) processing. Let's take an example:1 ImportReact, {Component} from ' React ';2 Import {3 Appregistry,4 StyleSheet,5 Text6} from '

Premise: A small web front end, completely not Android with iOS development, first contact, there are a lot of questions that do not understand. Please forgive me.Environment: Win7Results:First, the SDK installationHint: The installation must pass the agent, otherwise will be very slow yo ~ ~Install version 2.0 of Android Studio installationInstall the following SDK in studioAdd an environment variable (the variable value is the SDK path):Second, global reac