'require（...）'是一个常见的javascript模式还是库函数？ [英] Is 'require(...)' a common javascript pattern or a library function?

问题描述

我通常认为这是node.js脚本/模块中的第一行以及phantomJS，casperJS等。我很好奇，如果这是服务器端javascript（SSJS）的常见模式（类似于 #include 在C / C ++中或 import 在Java中）或者它是一个像RequireJS或LabJS这样的库被调用包含（目前我还没有机会在实践中使用）？

I usually find this as the first line in node.js scripts/modules as well as phantomJS, casperJS etc. I'm curious, if this is a common pattern for server-side javascript (SSJS) (similar to #include in C/C++ or import in Java) or is it a a library like RequireJS or LabJS that is being called for this inclusion (neither of which I have gotten a chance to use in practice, as yet)?

例如 var http = require（'http'）或 var casper = require（'casper'）。create（）

我很好奇这个模式是否已成为SSJS的标准化或每个库/工具是否调用现有函数？

I'm curious if this is a pattern that has become standardized for SSJS or does every library/tool call an existing function?

请原谅问题的 n00b 维度，但我想知道其无所不在的'原因'：）

Please pardon the n00b dimension to the question but I would like to know the 'why' behind its omnipresence :)

推荐答案

require（） idiom是一个名为 CommonJS 。具体来说，该规范的那部分称为模块。 RequireJS 只是CommonJS的一个实现（它通常是一个浏览器端实现 - 事实上，它需要不同的方法，因为浏览器的异步性质。）

The require() idiom is part of a specification known as CommonJS. Specifically, that part of the spec is called 'Modules'. RequireJS is just one implementation of CommonJS (and it's usually a browser-side implementation - in fact, it takes a different approach because of the asynchronous nature of the browser).

如果您查看CommonJS网站上的实施列表，您将查看节点.js列出。请注意，它实现了模块。因此，它就是它的来源 - 它非常内置。

If you look at the list of implementations on the CommonJS site, you'll see Node.js listed. Notice that it implements 'Modules'. Hence, that's where it's coming from - it's very much built-in.

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