出现这种情况,需要检查一下以下事项 1.ts类型声明和html里写的是否一致 1.1举例如下,子组件代码需要注意事项,子组件调用父组件方法,点击传参给父组件,在父组件触发一些时间,当前this指向是父组件的this <button (click)="sentToParent(data)">点击传参给父组件,在父组件触发一些时间,当前this指向是父组件的this</button> @Input() public childObjData = { a: '', b…

原因:组件返回了个不是<></>的东西 原先代码: export default class Index extends React.PureComponent { render() { return reactDOM.createPortal( <div>传送内容</div>, document.body ); } } 结局方案: export default class Index extends React.PureComponent { render…

TypeScript 错误property does not exist on type Object 在TypeScript中如果按JS的方式去获取对象属性,有时会提示形如Property 'value' does not exist on type 'Object'的错误.具体代码如下: var obj: Object = Object.create(null); obj.value = "value";//[ts] Property 'length' does not exist…

正文从这开始~ 总览 当我们尝试从函数组件中返回元素组成的数组时,会产生"Type '() => JSX.Element[]' is not assignable to type FunctionComponent"错误.为了解决该错误,可以将元素数组包裹在React片段中. 这里有个示例用来展示错误是如何发生的. // App.tsx import React from 'react'; // ️ Type '() => JSX.Element[]' is not ass…

今天在完成项目的时候遇到了下面的异常信息: 04-Aug-2014 15:49:27.894 SEVERE [http-apr-8080-exec-5] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [cms] in context with path [/cms] threw exception [Request processing failed; nested excep…

/Users/Rubert/IOS/iworkspace/LineList/LineList/main.c::: Format specifies type 'int' but the argument has type 'struct node *'…

springMVC action接收参数: org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 1 errorsField error in object 'projectStep' on field 'createDate': rejected value [2016-6-23]; codes [typeMismatch.projectSt…

To check if a type is a subclass of another type in C#, it's easy: typeof (SubClass).IsSubclassOf(typeof (BaseClass)); // returns true However, this will fail: typeof (BaseClass).IsSubclassOf(typeof (BaseClass)); // returns false Is there any way to…

异常信息如下: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.Date' to required type 'java.sql.Timestamp' for property 'wfsj'; nested exception is java.lang.IllegalStateException: Cannot conver…

Java新手,困扰了一下午. 发布时总是报这样一个错误. org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'XXX': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException…