当TypeScript 第一次引入索引符号时,你只能使用“方括号包括的”元素获取语法(如person["name"])来获取它们声明的属性。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 interfaceSomeType{/** This is an index signature. */[propName:string]:any;}functiondoStuff(value:SomeType){letx=value["somePr...
ArkTS classX{publicname:string=''}letx: X = {name:'x'};console.log(x.name);lety = ['a','b','c'];console.log(y[2]);// 在需要通过非标识符(即不同类型的key)获取数据的场景中,使用Map< Object, some_type >。letz =newMap<Object,string>(); z.set('name','1'); z.set(2,'...
interface Bird { fly(): void; layEggs(): void; } interface Fish { swim(): void; layEggs(): void; } declare function getSmallPet(): Fish | Bird; let pet = getSmallPet(); pet.layEggs(); // Only available in one of the two possible types pet.swim(); Property 'swim' does no...
functiongetUrls(url: string | URL, names: string[]){if(typeofurl==="string") {url=newURL(url); }returnnames.map(name => {url.searchParams.set("name", name)// ~~~// error!// Property 'searchParams' does not exist on type 'string | URL'.returnurl.toString(); }); } Here, ...
<script src="ts">//注意1.导入Watchimport { Component, Vue,Watch } from "vue-property-decorator";vardata = {name: "小明",age: 18}; @Component exportdefaultclass Home extends Vue { public count: number= 0; public watchMsg: string= "开始";//计算属性get countChange(): number {returnth...
(Button:constructor) | the class constructor}** Sometimes a name has special characters that are not a legal TypeScript identifier:** {@link restProtocol.IServerResponse."first-name" | the first name property}** Here is a fairly elaborate example where the function name is an ECMAScript 6...
git config --global user.name userName git config --global user.email userEmail 使用HTTPS 协议时,命令行会出现如下账号密码验证步骤。基于安全考虑,Gitee 建议配置并使用私人令牌替代登录密码进行克隆、推送等操作 Username for 'https://gitee.com': userName ...
所有通过 @typedef {object} 和@property(或者用 @prop 也可以)定义的这种类型都会被 TS 特殊解析。这里可以用 object 或Object. 你可以在 {} 中加上等号表示它具有默认值,这实际上和用方括号包裹属性名等价,但语义上看起来可能更清晰,或者在后边的属性名那里用方括号包裹加上等号——实际上这几种方式用于表示...
You can pass aditional transforms to the compiler pipeline. We aligned with the interface ofawesome-typescript-loader. You can specify transforms by setting thegetCustomTransformersoption. The option expects a string, pointing at a module that exposes the transforms, or a function that returns the...
.0 in 20.8.0) is initialized to zero by Definitely Typed and is incremented each time a new @types/node package is published to npm for the same major/minor version of the corresponding library. Sometimes type declaration package versions and library package versions can get out of sync. ...