jsx

opening a modal with the click of a button

由 雨燕双飞 提交于 2020-01-01 10:41:50
问题 The next code uses a Modal react component: export class AddWorkLogEditor extends React.Component { constructor(props) { super(props); this.addWorkLog = this.addWorkLog.bind(this); this.onOpenModal = this.onOpenModal.bind(this); this.onCloseModal = this.onCloseModal.bind(this); this.state = { open:true }; } onOpenModal() { this.setState({open: this.props.openModal}); } onCloseModal() { this.setState({open:false}); } addWorkLog() { } render() { const bstyle = { backgroundColor: 'green',

opening a modal with the click of a button

由 有些话、适合烂在心里 提交于 2020-01-01 10:41:48
问题 The next code uses a Modal react component: export class AddWorkLogEditor extends React.Component { constructor(props) { super(props); this.addWorkLog = this.addWorkLog.bind(this); this.onOpenModal = this.onOpenModal.bind(this); this.onCloseModal = this.onCloseModal.bind(this); this.state = { open:true }; } onOpenModal() { this.setState({open: this.props.openModal}); } onCloseModal() { this.setState({open:false}); } addWorkLog() { } render() { const bstyle = { backgroundColor: 'green',

create react app not loading css background images in dev or build

由 巧了我就是萌 提交于 2020-01-01 09:12:12
问题 I'm having difficulty with some background images not loading. I've made some significant modifications to the initial create react app, my folder structure is now as follows: Note: I have omitted some files & folders, if you need more please let me know. App/ node_modules/ src/ client/ build/ node_modules/ public/ src/ css/ App.css images/ tree.png yeti.png App.jsx server/ package.json Procfile Here are the steps I take to create this issue: $ cd src/server && npm run dev This will boot up

create react app not loading css background images in dev or build

由 纵然是瞬间 提交于 2020-01-01 09:10:07
问题 I'm having difficulty with some background images not loading. I've made some significant modifications to the initial create react app, my folder structure is now as follows: Note: I have omitted some files & folders, if you need more please let me know. App/ node_modules/ src/ client/ build/ node_modules/ public/ src/ css/ App.css images/ tree.png yeti.png App.jsx server/ package.json Procfile Here are the steps I take to create this issue: $ cd src/server && npm run dev This will boot up

jsx简介

由 ⅰ亾dé卋堺 提交于 2019-12-31 16:02:22
我们来观察一下声明的这个变量： const element = < h1 > Hello , world ! < / h1 > ; 这种看起来可能有些奇怪的标签语法既不是字符串也不是 HTML。 它被称为 JSX， 一种 JavaScript 的语法扩展。 我们推荐在 React 中使用 JSX 来描述用户界面。JSX 乍看起来可能比较像是模版语言，但事实上它完全是在 JavaScript 内部实现的。 JSX 用来声明 React 当中的元素。在 下一个章节 里面我们会详细介绍元素是如何被渲染出来的，接下来呢，我们先来看看 JSX 的基本使用方法。 在 JSX 中使用表达式 你可以任意地在 JSX 当中使用 JavaScript 表达式 ，在 JSX 当中的表达式要包含在大括号里。 例如 2 + 2 ， user.firstName ， 以及 formatName(user) 都是可以使用的。 function formatName(user) { return user.firstName + ' ' + user.lastName; } const user = { firstName: 'Harper', lastName: 'Perez' }; const element = ( <h1> Hello, {formatName(user)}! </h1> );

React - JSX syntax issue, and how to iterate with map and display items on newlines

由 蹲街弑〆低调 提交于 2019-12-31 07:31:16
问题 I'm a React noob and making a ToDo list style Recipe List app. I have a functional component, Item.js, and I am using JSX and the map function to iterate through each recipe item and display them. I want each recipe item to appear on a new line, but when I use .map to iterate through them React puts the entire list of recipe items into one p tag instead of one p tag for each item. How can I iterate through the recipe items and display them on separate lines? Even if I try to display them as

React - JSX syntax issue, and how to iterate with map and display items on newlines

由 僤鯓⒐⒋嵵緔 提交于 2019-12-31 07:31:11
问题 I'm a React noob and making a ToDo list style Recipe List app. I have a functional component, Item.js, and I am using JSX and the map function to iterate through each recipe item and display them. I want each recipe item to appear on a new line, but when I use .map to iterate through them React puts the entire list of recipe items into one p tag instead of one p tag for each item. How can I iterate through the recipe items and display them on separate lines? Even if I try to display them as

React Accessing a value from an array

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-31 05:38:05
问题 I have a form in React which dynamically adds new input elements. This seems to be working ok but I cant seem to access the input values as shown in this screenshot... I have tried the following console.log(this.state.telephone.name) and... console.log(this.state.telephone.tidx.name) where tidx is the unique key. Here is the constructor... constructor() { super(); this.state = { role: "Installer", name: "", telephoneType: [{ name: "" }], telephone: [{ name: "" }], tidx: "", emailType: [{

React: Expected an assignment or function call and instead saw an expression

由 一世执手 提交于 2019-12-30 16:28:55
问题 I am trying to fix this lint error at line const def = (props) => { in following sample code. const propTypes = { prop1: PropTypes.string, prop2: PropTypes.string, prop3: PropTypes.string, prop4: PropTypes.string, prop5: PropTypes.string, } const abc = (props) => { some code here } const def = (props) => { <div> <div className=" ..some classes..">{abc}</div> <div className=" ..some classes..">{t('translation/something')}</div> <div ...> <someComponent do something /> if (some condition) { do

JSX or HTML autocompletion in Visual Studio Code

由 夙愿已清 提交于 2019-12-29 10:14:13
问题 Is there any way to use components or HTML completion in Visual Studio Code? Because typing each letter manually is not good idea when we have classes like Bootstrap etc. For example completion as in Emmet: ul>li*2>a var React = require('react'); var Header = React.createClass({ render: function () { return ( <nav className="navbar navbar-defaullt"> <div className="container-fluid"> <a href="/" className="navbar-brand"> <img width="50" height="50" src="images/logo.png" alt="logo" /> </a> <ul
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