在TypeScript 中使用readFile()函数 readFile()方法可以异步读取系统文件。因此,我们可以将回调函数参数传递给该函数。 让我们导入fs并初始化一个变量来保存文件路径。 import*as fs from'fs';constfileName:string='example.txt'; 使用readFile方法,如下所示。 fs.readFile(fileName,'utf8',(err,data)=>{con...
import defaultMember, * as name from "module-name"; import "module-name"; name 用来接收导入的值的对象的名称; member, memberN 要导入的外部模块的导出名称; defaultMember 要导入的外部模块的默认导出的名称; alias, aliasN 要导入的外部模块的导出的别名; module-name 要导入的外部模块的名称, 通常是文...
import{Project}from"ts-morph";// 创建一个TypeScript项目对象constproject=newProject();// 从文件系统加载tsconfig.json文件,并将其中的所有源文件添加到项目中project.addSourceFilesAtPaths("./tsconfig.json");// 获取项目中的所有源文件constsourceFiles=project.getSourceFiles(); 现在我们就可以通过sourceFile...
import * as React from "react"; // Both of these are equivalent: const x = <Foo a:b="hello" />; const y = <Foo a : b="hello" />; interface FooProps { "a:b": string; } function Foo(props: FooProps) { return <div>{props["a:b"]}</div>; } Namespaced tag names ...
This example declares a variable as string: XML var name: string; You can extend this simple type system with enumerated values and four kinds of object types: interfaces, classes, arrays and functions. For example, the following code defines an interface (one kind of object type) with the ...
export module Application { export interface IOHelper { exists(filename: string): bool; readText(fileName: string, def: string): WinJS.Promise; readText(fileName: string): WinJS.Promise; writeText(fileName: string, text: string): WinJS.Promise; remove(fileName: string): WinJS.Promise; ...
// 定义接口 interface IPerson{ // 定义变量 id:string; // 定义抽象方法 hello:()=>string; } // 实现接口 class Person implements IPerson { id: string; // 静态字段 static age:number; static name1: string; constructor(id:string){ this.id = id } hello():string{ return "hello" } //...
import*assignalRfrom"@microsoft/signalr";import"./css/main.css";constdivMessages: HTMLDivElement =document.querySelector("#divMessages");consttbMessage: HTMLInputElement =document.querySelector("#tbMessage");constbtnSend: HTMLButtonElement =document.querySelector("#btnSend");constusername =newDa...
importasmPromisefrom"./assemblyscript/moduleEntry.ts";asmPromise().then(function(asmModule){// here you can use the wasm.exportsasmModule.step();}) Options The loader supports some of the AS options here NameTypeDefaultDescription name{String|Function}[hash].[ext]Configure a custom filename te...
类型断言用来告诉编译器“我知道自己在干什么”, 有尖括号和as两种写法. 在 tsx 语法中, 只支持as. let name1: string = '111' let name2: string | number; // console.log(name2.toFixed()) console.log((name2 as number).toFixed()); // 双重断言 console.log((name1 as any) as boolean)...