jsx

I'm really new to React, and I'm pulling my hair out trying to solve what seems to me to be a simple problem. Here's a picture of the component I've built. Color Picking Component What I'm trying to accomplish seems trivial, but literally every article I've read explaining what to do has told me something different, and not one of the solutions has worked. It breaks down to this: When a user clicks on a tag, it builds out a tray and loops through an array of colors to build color buttons. When a color button is clicked it needs to pass which color was clicked to its parent component and run a

I want to write the equivalent in react: if (this.props.conditionA) { <span>Condition A</span> } else if (this.props.conditionB) { <span>Condition B</span> } else { <span>Neither</span> } So maybe render() { return (<div> {(function(){ if (this.props.conditionA) { return <span>Condition A</span> } else if (this.props.conditionB) { return <span>Condition B</span> } else { return <span>Neither</span> } }).call(this)} </div>) } But that seems overly complex. Is there a better way? Why do you say that the ternary is not expressive enough? render() { return <span> {this.props.conditionA ?

组件 Conceptually, components are like JavaScript functions. They accept arbitrary inputs (called “props”) and return React elements describing what should appear on the screen. 组件，从概念上类似于 JavaScript 函数。它 接受任意的入参（即 “props”） ，并 返回用于描述页面展示内容的 React 元素。 以上是 React 官方对组件的定义，有两个要素： 任意入参（任意的意思是可以有，也可以没有，可以有一个，也可以有多个）； 返回 React 元素（什么是 React 元素）。 React 元素 其实在上述对组件的定义中也已经给出了 React 元素的作用——用于描述页面展示内容。 Unlike browser DOM elements, React elements are plain objects , and are cheap to create. React DOM takes care of updating the DOM to match the React elements. 与浏览器的 DOM 元素不同， React 元素是创建开销极小的普通对象。 React DOM

I am having following script file <script language="javascript"> document.write('<script language="javascript" src="http://tickettransaction.com/?bid='+bid+'&sitenumber='+site+'&tid=event_dropdown" ></' + 'script>'); </script> I follow this Adding script tag to React/JSX but it does not work for me... How do I load the script in my react component? After a lots of R&D finally I found my solution. I have used npm postscribe to load script in react component postscribe('#mydiv', '<script language="javascript" src="http://tickettransaction.com/?bid='+bid+'&sitenumber='+site+'&tid=event_dropdown">

Recently I was facing an i was facing an issue coding React app on Visual Studio code. Because of this issue, whenever I wrote JSX inside the render function of the React Component and saved it, it would go messed up (I mean indentation would get messy). See the pic: This error was also showing error like: 1. Unclosed regular expression How to solve this? Abhay Shiro I tried several options like creating a .eslintrc file or .jshintrc file. But it turned out that in my Visual Studio Code IDE, there was third party extensions(eslint/jslint/tslint/beautify/jsformatter etc) that were causing a big

最近一段时间在零零碎碎地看 react 。在此，向所有自学 react 的朋友点个赞。多说一句，在自学道路上一定要戒骄戒躁，坚持下来。-----因为自学过程真的是心累啊（不同版本的博客不同的说法）。。。 下面，开始创建 React 项目。我使用的是 VS Code 编译器。 1、创建项目 我这里使用 React 官网给出的 Create React App 方式创建项目。 npm install -g create-react-app //第一步：全局安装react create-react-app my-app //第二步：创建 项目 （my-app是项目名） cd my-app //第三步：切换到 项目中 npm start //第四步：运行项目 首先，若果之前没有全局安装过 create-react-app ，这里需要全局安装一下（安装过就不需要）； 然后，使用 create-react-app my-app 命令创建项目 。其中，my-app是项目名，注意这里项目名勿使用驼峰命名方式，可以使用 ‘-’ 连接。(实测，有时候大写也没报错，有时候报错了) 错误提示： create-react-app myDemo 使用这条命令创建 myDemo 项目报错，如下： Could not create a project called "myDemo" because of npm

Import_this import {AppRegistry, Text, View, Button, StyleSheet} from 'react-native'; This my React Button code But style not working Hare ... <Button onPress={this.onPress.bind(this)} title={"Go Back"} style={{color: 'red', marginTop: 10, padding: 10}} /> Also I was try by this code <Button containerStyle={{padding:10, height:45, overflow:'hidden', borderRadius:4, backgroundColor: 'white'}} style={{fontSize: 20, color: 'green'}} onPress={this.onPress.bind(this)} title={"Go Back"} > Press me! </Button> Update Question: Also I was try by This way.. <Button onPress={this.onPress.bind(this)}