AI代码解释 functionMyConditionalComponent({condition,children}){returncondition?{children}:null;}return(<MyConditionalComponent condition={isLoggedIn}>Welcome,user!</MyConditionalComponent>); 总结来说,在JSX中没有直接的if语句,而是通过内联JavaScript表达式的逻辑来间接实现条件渲染。
(false/undefined/null不显示,0显示) 2、React...组件和props 1、React组件有几种生成方式 function形式 class (es6) 2、条件渲染方式有几种 function if/else 变量赋值 inline形式,比如{condition...,event事件就被销毁了,所以setTimeout执行的语句会报错 } render() { return (...
i tried this way condition but not work suppose like i want to click buton which is Español then i want print language spanish like other i want to click buton which is 标准粤语then i want print language cantonese like i want if else condition how can we do that . reactjs 来源:https...
Example 2: react if else statement with component src/App.js importReactfrom'react'; functionApp(){ functionMyCondition(props){ constuserType=props.type; if(userType==1){ returnHere,Youcan write admintemplate.Youare aAdmin.; }else if(userType == 2){ return Here, You can write manager ...
javascript 如何在Reactjs中使用if else条件您可以使用inline conditional (ternary operator)来呈现其中一个...
import React from 'react'; import { If, Fallback, Then, Else } from 'react-if'; const Example = () => { const fetchData = () => { // Return promise }; return ( <If condition={fetchData()}> <Fallback>Loading data ...</Fallback> <Then> {(data) => ( Here is your...
// JSX 代码:React.render(Hello World!, mountNode);// 编译成 JS 是这样的:React.render(React.createElement("div", {id:"msg"},"Hello World!"), mountNode); 这意味着if语句不合适。看下面这个栗子 // This JSX:Hello World!// Is transformed to this JS:React.createElement("div", {id:if(...
i tried this way condition but not work suppose like i want to click buton which is Español then i want print language spanish like other i want to click buton which is 标准粤语then i want print language cantonese like i want if else condition how can we do that . reactjs 来源:...
这是不合语法的 JS 代码。不过你可以采用三元操作表达式: React.render(Hello World!, mountNode); 当三元操作表达式不够健壮,你也可以使用if语句来决定应该渲染那个组件。 var loginButton; if (loggedIn) { loginButton = <LogoutButton />; } else { login...
In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true Useelseto specify a block of code to be executed, if the same condition is false Useelse ifto specify a new condition to test, if the first condit...