React-Native 踩坑第二弹-undefined is not a function(evaluating 'this.setState(...)) 先看报错的代码 importReact,{Component}from'react';import{AppRegistry,StyleSheet,Text,TextInput,Image,View}from'react-native';importMyScenefrom"./MyScene"importLogofrom"./node_a/Logo"importHomefrom"./node_a/H...
console.log(React) var TestClickComponent = React.creatClass({ render:function(){ return ( <div> <button>显示|隐藏</button><span>点击测试</span> </div> ); } }); var TestInputComponent = React.creatClass({ getInitialState:function(){ return{ inputContent:"" } ...
原因是react 16将createClass移除了,使用es6语法,如果必须使用es5创建类的话,请使用create-react-class包,请参考 官方文档代码 varReact=require("react");varcreateReactClass=require('create-react-class');import{StyleSheet,View,Text}from'react-native';varMyComponent=createReactClass({render(){return(<Viewst...
在组件文件的末尾,使用export关键字导出组件,例如:export default MyComponent;。 编译错误:如果你的代码使用了新的JavaScript语法或特性,可能需要使用Babel等工具进行编译。请检查你的项目是否已经正确地配置了编译工具,并确保代码能够成功编译。 如果以上解决方法都无效,可能是其他问题导致的错误。建议你查看具体的错误...
报错_react3.default.createClass is not a function 这个是因为react最新版本抛弃使用了createClass这个函数,这个也是为了配合ES6 。这种情况下会报错 var Popover=React.createClass({ propTypes: { isVisible:PropTypes.bool, onClose:PropTypes.func, }, ... ... ....
I receive TypeError: this.componentRef.current.addEventListener is not a function when attempting the Unmanaged Example from the Readme while using React 16.5. The error is thrown from panAndZoomHoc.tsx#L75 if (this.componentRef.current)...
react报错: dispatch is not a function import {connect} from'dva' @connect(({ testHome }) => ({ testHome })) class Methods extends Component{ } models文件定义exportdefault{ namespace:'testHome', }
当我们尝试从函数组件返回元素数组时,会发生 React.js 错误“Type '() => JSX.Element[]' is not assignable to type FunctionComponent”。 要解决该错误,需要将元素数组包装到 React 片段中。 下面是错误发生的示例。 importReactfrom'react';// ⛔️ Type '() => JSX.Element[]' is not assignable...
Do you want to request a feature or report a bug? Bug 🐛🐛 (May be 🤔🙄) What is the current behaviour? I have created react functional component and implement state full logic using useState method but it throws an TypeError: Object(...) is not a function Which versions of ...
const Name = (props) => { this.state = { data: null, visible: false }; const open = (data) => { this.setState({ data, visible: true }); } return ( <div>content</div> ); } 当执行open()时提示Unhandled Rejection (TypeError): _this.setState is not a function 尝试过 const ...