将文件B中的函数导入为import { sum } from './another-file'。 使用文件B中的导入函数。 下面是从名为another-file.ts的文件导出函数的示例。 another-file.ts // 👇️ named exportexportfunctionsum(a:number, b:number){returna + b; }// (arrow function)// export const sum = (a: number,...
let和const或nested functions是block-scoped，因此无法在原始函数之外访问它们。它们仅在嵌套函数（block-s...
let和const或nested functions是block-scoped，因此无法在原始函数之外访问它们。它们仅在嵌套函数（block-s...
这种方式会添加实际的import,如果是个纯粹的类型声明文件(只含有@typedef的.js,类似于d.ts),JSDoc 方式会引入一个无用文件(只含有注释),而 TypeScript 方式则不存在这个问题 P.S.TypeScript 同时兼容这两种类型引入语法,更多相关讨论见Question: Import typedef from another file? 类型转换 类型转换(TypeScript ...
// util.ts export let one = "1"; export let two = "2"; // add.ts import { one, two } from "./util"; export function add() { return one + two; } Even if the only thing we want to do is generate add.d.ts, TypeScript needs to crawl into another imported file (util....
another-file.ts // 👇️ default exportexportdefaultfunctionsum(a:number,b:number){returna+b;}// 👇️ named exportexportconstnum=250; And you would import the default export without wrapping it in curly braces. index.ts // 👇️ default and named importsimportsum,{num}from'./anot...
import { someFunc, BaseType } from "./some-module.js"; // ^^^ // Error: 'BaseType' is a type and must be imported using a type-only import // when 'preserveValueImports' and 'isolatedModules' are both enabled. That makes another TypeScript 4.5 feature, type modifiers on import nam...
For example, this change to a function in a .d.ts file adding a new param to a function: index.d.ts: - export function twoslash(body: string): string + export function twoslash(body: string, config?: { version: string }): string <my-package>-tests.ts: import {twoslash} from "...
-import { otherFunc } from "other";+import { otherFunc, OtherType } from "other";-export function func() {+export function func(): OtherType {return otherFunc(); } Some hints that this might be worth trying are if your--declarationemit contains types likeimport("./some/path").Some...
TypeScript 支持 ES6 的模块语法,允许使用import和export语句。 例子: // someModule.tsexportfunctionsomeFunction(){/* ... */}// anotherModule.tsimport{someFunction}from'./someModule'; 命名空间(Namespaces): TypeScript 的命名空间是另一种组织代码的方式,它可以防止全局作用域污染。