首先,你需要在本地创建一个 TypeScript 项目。你可以使用以下命令初始化一个新的 npm 项目,并安装 TypeScript。 AI检测代码解析 # 创建项目文件夹mkdirts-spread-examplecdts-spread-example# 初始化 npm 项目npminit-y# 安装 TypeScriptnpminstalltypescript --save-dev# 创建 tsconfig.json 配置文件npx tsc--in...
extends is a new top-level property in tsconfig.json (alongside compilerOptions, files, include, and exclude). The value of extends must be a string containing a path to another configuration file to inherit from. The configuration from the base file are loaded first, then overridden by those...
"The option `excludes` is not valid. Did you mean `exclude`?" ); } } Try To make these types of situations easier, a while back, TypeScript made it possible to use “dotted” property access syntax likeperson.namewhen a type had a string index signature. This also made it easier to...
2. Spread Operator Example Let us check out a few examples of the spread operator to understand its usage better. 2.1. Initialize a New Array from Another Array We can use the spread operator to create arrays from existing arrays in the given fashion. letorigArrayOne=[1,2,3];//1,2,3...
--exclude:这是一个要从编译中排除的文件夹和文件的数组。 --include:这是一个要包含在编译中的文件夹和文件的数组。 本节仅提供了 TypeScript 一些新特性的简要概述,以及一些与配置相关的信息。然而,这些新特性和配置 TypeScript 的能力非常重要,在我们开始编写代码的后续章节中将会被广泛使用。 总结 在本章中...
┃ ┃// ┃ ┗━ Property 'toUppercase' does not exist on type 'string'. Did you mean 'toUpperCase'?// ┃// ┗━ 'value' is possibly 'undefined'.if(done) {return; } } } You’ll typically seeBuiltinIteratorReturnpaired up withIteratorObjectthroughoutlib.d.ts. In general, we recommend...
2471 错误 A computed property name of the form '{0}' must be of type 'symbol'. 窗体“{0}”的计算属性名必须是 "symbol" 类型。2472 错误 Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher. 仅当面向 ECMAScript 5 和更高版本时,"new" 表达式中的...
For cloning, adding items, merging, etc, you might wonder why you would use the spread operator over solutions like .push(), or just setting a property. The main benefit in a lot of cases is mutability. In a lot of cases, such as when building apps with React, you may not want to...
error("The option `excludes` is not valid. Did you mean `exclude`?"); } } To make these types of situations easier, a while back, TypeScript made it possible to use “dotted” property access syntax like person.name when a type had a string index signature. This also made it easier...
使用spreadoperator时，typescript没有注意到属性不能为null/undefined此问题在ms/TS#42384中出现，其中...