{"compilerOptions":{"target":"es2016",// 编译生成的目标版本代码// "lib": ["esnext","dom","dom.iterable","scripthost"], // 指定我们需要用到的库,也可以不配置,直接根据 target 来获取 /* Specify a set of bundled library declaration files that describe the target runtime environment. */...
interfaceAdmin{name:string;privileges:string[];}interfaceEmployee{name:string;startDate:Date;}type UnknownEmployee=Employee|Admin;functionprintEmployeeInformation(emp:UnknownEmployee){console.log("Name: "+emp.name);if("privileges"inemp){console.log("Privileges: "+emp.privileges);}if("startDate"inemp...
interfaceHeight{[name:string]:string// 属性值可以是任意字符串}interfaceConfig{width?:number;height:Height,[propName:string]:any;} 继承接口 代码语言:javascript 代码运行次数:0 运行 AI代码解释 interfaceVIPUserextendsUser,SupperUser{// 可以继承多个接口broadcast:()=>void} 类 「TypeScript」的类加强了...
interface MouseEvent<T = Element, E = NativeMouseEvent> extends UIEvent<T, E>{//...} interface UIEvent<T = Element, E = NativeUIEvent> extends SyntheticEvent<T, E>{//...} interface SyntheticEvent<T = Element, E = Event> extends BaseSyntheticEvent<E, EventTarget & T, EventTarget>...
如果未显式分配值,则此块标记用于记录字段或属性的默认值。此标记只能与属于 TypeScript class 或 interface 成员的字段或属性一起使用。 例如: enum WarningStyle {DialogBox,StatusMessage,LogOnly}interface IWarningOptions {/*** Determines how the warning will be displayed.** @remarks* See {@link Warnin...
在以上代码中,首先通过keyof T拿到T的所有属性名,然后使用in进行遍历,将值赋给P,最后通过T[P]取得相应的属性值。中间的?号,用于将所有属性变为可选。 示例: interface Todo { title: string; description: string; } function updateTodo(todo: Todo, fieldsToUpdate: Partial<Todo>) { ...
myObj.set("even", [0,2,4]); myObj.set("odd", [1,3,5]); Note that in the above example ofObject.groupBy, the object produced uses all optional properties. Copy interfaceEvenOdds{ even?:number[]; odd?:number[]; }constmyObj:EvenOdds=Object.groupBy(...); ...
set size(value: string | number | boolean) { let num = Number(value); // Don't allow NaN, Infinity, etc if (!Number.isFinite(num)) { this._size = 0; return; } this._size = num; } } 索引签名 类可以声明索引签名; 这些工作与其他对象类型的索引签名相同: ...
z.set(2,'2');console.log(z.get('name'));console.log(z.get(2));enumTest { A ='aaa', B ='bbb'}letobj: Record<string,number> = { [Test.A]:1,// 枚举中的字符串值[Test.B]:2,// 枚举中的字符串值['value']:3// 字符串字面量} ...
: boolean// 是否隐藏改该表单项}exportinterface Options {form: Partial<A.FormInstance['$props']>// 继承<a-form>的propsrow?: Partial<typeofimport('@arco-design/web-vue')['Row']['__defaults']>// 最外层row,继承<a-row>的propscolumns: ColumnsItem[]...