javascript - 什么原因/*全局模块: false*/in grunt. js

Question

许多 grunt.js 脚本以:

/*global module:false*/
module.exports = function(grunt) {

但是第一行注释的原因是什么？

Answer 1

它是 JSLint 或 JSHint 的指令。它告诉 JSLint/JSHint 解析器标识符 module 是在别处定义的，因此它不会抛出错误，告诉您 module 未定义。没有它，解析器将遇到对 module 的引用，并认为您正在尝试引用 undefined variable 。

来自 JSLint docs :

JSLint also recognizes a /*global*/ directive that can indicate to JSLint that variables used in this file were defined in other files. The directive can contain a comma separated list of names.

还有 JSHint docs :

In addition to options, you can let JSHint know what global variables it should expect:

    /*global DISQUS:true, jQuery:false */

In the example above, JSHint will allow you to override DISQUS, but complain if you try to override jQuery.