functionsetAge(age:string|number){console.log('我的年纪是'+age.toString());} 2、判断类型,分别处理达到函数目的 代码语言:javascript 代码运行次数:0 运行 AI代码解释 functionsetAge(age:string|number){if(typeofage==="string"){console.log('我是字符串');}else{console.log('我是number');}} 类...
}//使用组件type IProps ={ name: string; age: number; };<MyComponent<IProps> name="React" age={18} />; //Success<MyComponent<IProps> name="TypeScript" age="hello" />; // Error 2. 函数组件 通常情况下,函数组件我是这样写的: interface IProps { name: string } const App= (props...
最简单的解决方案是更改onCategoriesChange正在等待的参数类型，使其变为：
function error(msg: string): never { throw new Error('我报错了'); // 直接异常结束了 } function loop(): never { while (true) {} } function fn(x: number | string) { if (typeof x === 'number') { // 类型保护 console.log(x); } else if (typeof x === 'string') { consol...
@Watch("$route",{immediate:true})privateonRouteChange(route:Route){constquery=route.queryasDictionary<string>;if(query){this.redirect=query.redirect;this.otherQuery=this.getOtherQuery(query);}} @Watch(path: string, options: WatchOptions = {}) ...
For more information,see the change here. Improved Checking Against Template Strings with Interpolations TypeScript now more accurately checks whether or not strings are assignable to the placeholder slots of a template string type. Copy functiona<Textends{id:string}>() {letx:`-${keyof T &...
泛型泛型主要是为了解决类型复用的问题。可以说泛型给了你在使用 ts 类型检测的体验同时,又提供了很好的类型扩展性、可维护性。在使用泛型类型时,可以将泛...
(非常常见) */onChange: (id: number) => void;/** 接受事件的函数类型语法(非常常见) */onChange: (event: React.ChangeEvent<HTMLInputElement>) => void;/** 接受事件的替代函数类型语法(非常常见) */onClick(event: React.MouseEvent<HTMLButtonElement>): void;/** 一个可选的props(非常常见!) ...
typeNames (string, defaultValue:change-case-all#pascalCase) Changes the case of types. The format of the converter must be a validmodule#method. You can also usekeepto keep all GraphQL names as-is. Available case functions inchange-case-allarecamelCase,capitalCase,constantCase,dotCase,headerCas...
['node_modules', 'logs'], // ignore files change max_memory_restart: '1G', // restart if process use more than 1G memory merge_logs: true, // if true, stdout and stderr will be merged and sent to pm2 log output: './logs/access.log', // pm2 log file error: './logs/error...