类型“string[]"上不存在属性“includes" [英] Property 'includes' does not exist on type 'string[]'

问题描述

出现错误

'string[]' 类型不存在属性 'includes'

Property 'includes' does not exist on type 'string[]'

在 node_modules/ng2-breadcrumb/app/components/breadcrumbService.ts我正在尝试在 angular2 应用中实现面包屑功能.

in node_modules/ng2-breadcrumb/app/components/breadcrumbService.ts I am trying to implement breadcrumb functionality in an angular2 app.

推荐答案

将 "ES2017" 添加到 tsconfig.json 中的 "lib" 数组代码>:

Add "ES2017" to your "lib" array in tsconfig.json:

{
  "compilerOptions": {
    ...
    "lib": ["es6", "dom", "es2017"],
    ...
    "target": "es5",
    ...
  }
}

这应该从 TypeScript 2.1 开始工作.

This should work since TypeScript 2.1.

一个相关问题.

includes<从 ES7 (ES2016) 开始支持 Array 上的/code> 方法.以上将添加一个缺少的库文件进行编译.

The includes method on Array is supported since ES7 (ES2016). The above will add a missing library file to compilation.

TypeScript 编译器选项记录在此处.

The TypeScript compiler options are documented here.

Lib es2016 或 es7 可能足以代替 es2017(未测试).

Lib es2016 or es7 may be sufficient instead of es2017 (not tested).

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