jsx

Importing all files from a folder in react

与世无争的帅哥 提交于 2019-12-12 04:31:54
问题 I am importing all SVG's from a folder in 'icons' through an index.jsx like the following line: index.jsx: export about from './about.svg'; Here goes the Import: Button.jsx import React from 'react'; import './MenuIcon.scss'; import * as IconID from './icons'; const Button = (props) => { return ( <div className="menu-icon" > <div className={'menu-icon__icon-wrapper'}> <IconID.about /> // This works great <IconID['about'] /> // This does not work </div> </div> ); }; export default Button; Now

React native: loop through object array using an array to create components

人盡茶涼 提交于 2019-12-11 19:12:00
问题 In React Native (I'm very new to React) I have a javascript function that returns an array in a variable called myResult. Printed in the terminal it shows: Array [ 25, 25, 20, 10, 5, 5, ] which I add to the state with this.setState({resultArray: myResult}); Then, in the state I have an array like so: this.state = { foodList: [ {id: "25", src: `"./images/banana25.png"` }, {id: "20", src: `"./images/banana20.png"` }, {id: "15", src: `"./images/apple15.png"` }, {id: "10", src: `"./images/mango10

React stateless components

99封情书 提交于 2019-12-11 16:58:56
问题 Let's say I have a component for lists rendering and I can do it in two different ways. The first one: const renderItem => item => <li>{item}</li>; const List = ({ items }) => ( <ul> {items.map(renderItem)} </ul> ); And the second one: const List = ({ items }) => { const renderItem => item => <li>{item}</li>; return ( <ul> {items.map(renderItem)} </ul> ); }; What is the difference between these approaches? I mean performance, renderings count, best practice or anti-pattern, etc. 回答1:

SyntaxError in Webpack / React.js Unexpected token = { } in React

大兔子大兔子 提交于 2019-12-11 16:54:11
问题 In one of my .js file, I'm getting the following error from Webpack: 4 | export default function(ComposedComponent) { 5 | class Authentication extends Component { > 6 | static contextTypes = { | ^ 7 | router: React.PropTypes.object 8 | } 9 | These are my devdependencies: "devDependencies": { "babel-core": "^6.17.0", "babel-loader": "^6.2.0", "babel-plugin-transform-object-rest-spread": "^6.26.0", "babel-preset-env": "^1.6.0", "babel-preset-react": "^6.16.0", "babel-preset-stage-3": "^6.24.1",

Material-UI CardContent has a 3px Bottom Padding

梦想与她 提交于 2019-12-11 15:38:39
问题 Note: I already looked into this question: Cant remove padding-bottom from Card Content in Material UI But the accepted answer did not fix my issue. I am using the Material UI React Library attempting to recreate the below image: I am completely new to using the Material UI, so most of my code will likely not be optimized and probably does not follow best practices. Indeed, I'd be interested to hear how it could be made better. Here is my code thus far: <Card className={classes.card}>

Set Textarea value to text or json of data properly in a function

折月煮酒 提交于 2019-12-11 15:27:39
问题 I come from Angular and jquery before that. Seems that how state, props, contructors, ComponentDidMount etc.. are owning me. I simply have a Textarea that I want to end up json stringify the form data to on button click to set to the json, but i will even settle for just having the function set the textarea value. import React from 'react'; export default class ClinicalMain extends React.Component { constructor(props) { super(props); } state = { selectedOption : '' } // my function to update

Returning JSX from function yields nothing

若如初见. 提交于 2019-12-11 14:25:39
问题 Followup from Return JSX from function I have a a component that needs to check for multiple options and return based on those options. Therefore I have created an outside function that is called in my component return statement to determine the format that will be returned: render() { const { policy } = this.props; let deployment = policy.Deployment; let value = policy.value; let policyLegend = deployment.policyLegend; let policyObj = this.valueToPolicy(policyLegend, value); console.log

Why importing components from other files caused “Invariant Violation: Element type is invalid” error?

只愿长相守 提交于 2019-12-11 14:24:44
问题 I'm fairly advanced in iOS Swift language, but very new in react native framework or javascript language. I also have tried to find the right tutorial for stack navigator for hours but I can't find it. I'm currently using this tutorial to learn the basic of react native stack navigation, and would like to split the two screens into their own files. Basically, I want to mimic Swift with its AppDelegate.swift and View Controller's files. But it generates error like this: Invariant Violation:

Client-side JSX transpiling

元气小坏坏 提交于 2019-12-11 14:10:35
问题 I want to create React applications with JSX and not have to use a terminal or any server-side/dev environment commands. The environment we are using doesn't allow for commands to be run in the dev environment and these applications will be purely statically hosted on a CDN. So I know I can simply include Babel's browser.js to do the JSX transpiling in the browser. Perfect. My concern is that Babel apparently stopped supporting this and modern versions of Babel have it removed. Is there

In JSX How to redirect on Handlesubmit from DataPicker?

北慕城南 提交于 2019-12-11 09:58:17
问题 I am passing the date picked to the this.state.value Getting a time stamp of Midnight that day, but I can not seem to get it to render a new page so I can build the booking page. Where it takes the time stamp and checks for available times that day. When I did return the Handlesubmit on a half successful rerender I got a white page and back to the main app page with a blank date to choose again. I have tried to build this as a functional component in the handleSubmit But also tried to return