如果我使用 const，为什么 JSHint 会发出警告?

问题描述

这是我在使用 const 时遇到的错误:

This is the error I get when using const:

<error line="2" column="1" severity="warning" message="&apos;const&apos; is available in ES6 (use esnext option) or Mozilla JS extensions (use moz)." source="jshint.W104" />

我的代码如下所示:

const Suites = {
    Spade: 1,
    Heart: 2,
    Diamond: 3,
    Club: 4
};

代码运行良好，只有 JSHint 每次都警告我.

The code works fine only JSHint is warning me every time.

推荐答案

当依赖 ECMAScript 6 功能(例如 const)时，您应该设置此选项，以便 JSHint 不会引发不必要的警告.

When relying upon ECMAScript 6 features such as const, you should set this option so JSHint doesn't raise unnecessary warnings.

/*jshint esnext: true */(编辑 2015.12.29:更新语法以反映 @Olga 的评论)

/*jshint esnext: true */ (Edit 2015.12.29: updated syntax to reflect @Olga's comments)

/*jshint esversion: 6 */

const Suites = {
    Spade: 1,
    Heart: 2,
    Diamond: 3,
    Club: 4
};

顾名思义，此选项告诉 JSHint 您的代码使用 ECMAScript 6 特定的语法.http://jshint.com/docs/options/#esversion

This option, as the name suggests, tells JSHint that your code uses ECMAScript 6 specific syntax. http://jshint.com/docs/options/#esversion

Edit 2017.06.11:基于this answer添加了另一个选项.

Edit 2017.06.11: added another option based on this answer.

虽然内联配置适用于单个文件，但您也可以通过在项目的根目录中创建 .jshintrc 文件并将其添加到其中，为整个项目启用此设置.

While inline configuration works well for an individual file, you can also enable this setting for the entire project by creating a .jshintrc file in your project's root and adding it there.

{
  "esversion": 6
}

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