import * as fs from 'fs';: 导入 Node.js 的文件系统模块,使我们能够读取文件。 function readTextFile(filePath: string) {...}: 定义一个函数,接收文件路径作为参数。 fs.readFile(filePath, 'utf8', (err, data) => {...: 使用fs.readFile方法异步读取文件,utf8是指定的编码格式。 if (err) ...
exportasyncfunctionreadTextFile(file:File){constreader=newFileReader();reader.readAsText(file);returnnewPromise((resolve,reject)=>{reader.onload=()=>resolve(reader.result);reader.onerror=()=>reject(reader.error);});}exportasyncfunctionreadBinaryFile(file:File){constreader=newFileReader();reader.r...
(event)=>{// 获取用户选择的文件constfile=fileInput.files[0];// 打开文件constreader=newFileReader();reader.onload=(event)=>{// 读取文件内容constcontent=event.target.resultasstring;console.log(content);};reader.readAsText(file);});
readFileSync('./config.json', 'utf-8'); const config = JSON.parse(loadedConfig); console.log(config); All we need to do after is use JSON.parse() to convert the JSON text into an object. You might notice you get no type inference on this however since TypeScript doesn’t know ...
Blob、File、ArrayBuffer、TypedArray、DataView究竟应该如何应用在应用程序中，我们经常需要将日期字符串转换...
let ro: ReadonlyArray = arr1; // arr1.push(3); // ro[1] = 4; // ro.push(6); // ro.length = 100; // arr1 = ro; // let arr3: number[] = ro 元组类型(tuple) 控制了数组成员的类型和数量 let tuple: [string, number] = ['sxh', 18]; // 元组越界问题: tuple.push(2...
Our team is already hard at work on TypeScript 5.2, and you can read the specifics on the TypeScript 5.2 Iteration Plan. In addition to planned work items, this iteration plan describes target release dates which you can use to for your own plans. The best way to play with what’s ne...
Read next June 6, 2024 Announcing TypeScript 5.5 RC Daniel Rosenwasser June 20, 2024 Announcing TypeScript 5.5 Daniel Rosenwasser Today we are excited to announce the availability of TypeScript 5.5 Beta. To get started using the beta, you can get it through NuGet, or through npm with ...
class MyClass {/*** This event is fired whenever the application navigates to a new page.* @eventProperty*/public readonly navigatedEvent: FrameworkEvent<NavigatedEventArgs>;} 1.2.7@example 指示应作为示例演示如何使用 API 的文档部分。 它可能包括代码示例。
开发前请熟悉鸿蒙开发指导文档:[gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md] 强制使用静态类型 静态类型是ArkTS最重要的特性之一。如果程序采用静态类型,即所有类型在编译时都是已知的,那么开发者就能够容易理解代码中使用了哪些数据结构。同时,由于所有类型在程序实际运行前都是已知的,编译器可以...