react-jsx

来源： https://stackoverflow.com/questions/28567549/how-to-use-if-within-a-map-return

来源： https://stackoverflow.com/questions/44708416/react-filtering-the-state-without-ruining-it

问题 Is there any way to move the jsx from a component's render function to a separate file? If so, how do I reference the jsx in the render function? 回答1: Here is a pattern for separating the template jsx that uses CommonJS modules in NodeJS, Browserify or Webpack. In NodeJS, I found the node-jsx module helpful to avoid the need to compile the JSX. // index.js require('node-jsx').install({extension: '.jsx'}); var React = require('react'), Component = require('./your-component'); // your-component

问题 Is there any way to move the jsx from a component's render function to a separate file? If so, how do I reference the jsx in the render function? 回答1: Here is a pattern for separating the template jsx that uses CommonJS modules in NodeJS, Browserify or Webpack. In NodeJS, I found the node-jsx module helpful to avoid the need to compile the JSX. // index.js require('node-jsx').install({extension: '.jsx'}); var React = require('react'), Component = require('./your-component'); // your-component

问题 When casting in a .tsx file, the compiler assumes it to be JSX, e.g.: (<HtmlInputElement> event.target).value gives an error JSX element type 'HtmlInputElement' is not a constructor function for JSX elements How do you cast TypeScript in a .tsx file? 回答1: The as operator was introduced to TypeScript 1.6 to replace casts in .tsx files, e.g.: (event.target as HTMLInputElement).value The TypeScript wiki explains the 1.6 changes: it makes the new as operator the default way to cast (removing any

问题 I am trying to create a password confirmation feature that renders an error only after a user leaves the confirmation field. I'm working with Facebook's React JS. This is my input component: <input type="password" placeholder="Password (confirm)" valueLink={this.linkState('password2')} onBlur={this.renderPasswordConfirmError()} /> This is renderPasswordConfirmError : renderPasswordConfirmError: function() { if (this.state.password !== this.state.password2) { return ( <div> <label className=

问题 I am trying to create a password confirmation feature that renders an error only after a user leaves the confirmation field. I'm working with Facebook's React JS. This is my input component: <input type="password" placeholder="Password (confirm)" valueLink={this.linkState('password2')} onBlur={this.renderPasswordConfirmError()} /> This is renderPasswordConfirmError : renderPasswordConfirmError: function() { if (this.state.password !== this.state.password2) { return ( <div> <label className=

问题 I am trying to create a password confirmation feature that renders an error only after a user leaves the confirmation field. I'm working with Facebook's React JS. This is my input component: <input type="password" placeholder="Password (confirm)" valueLink={this.linkState('password2')} onBlur={this.renderPasswordConfirmError()} /> This is renderPasswordConfirmError : renderPasswordConfirmError: function() { if (this.state.password !== this.state.password2) { return ( <div> <label className=

问题 I am trying to render boolean value inside JSX, however React is evaluating it as expression and isn't returning anything after the component is returned. Any workaround for this? Here is an example var ipsumText = true; ReactDOM.render( <div> Boolean Value: {ipsumText} </div>, document.getElementById('impl') ); Just shows compiled HTML as <div data-reactid=".0"><span data-reactid=".0.0">Boolean Value: </span></div> EDIT: Here is the JSBin link for the example http://jsbin.com/nibihodoce/1

问题 My app has a feature toggle functionality that tells my UI whether or not a piece of UI should be rendered. I would like to create a Higher Order Component to conditionally render these types of components. In one scenario, I'm trying to conditionally render a list, but I'm running into this error: ConditionalRender(...): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object. This makes sense since I just am trying to render