node.js - `require("模块的差异") ;` to ` 需要 ("module").function;`

Question

你好，我只是想知道在 NodeJS 的 require 中实现这种逻辑是否存在任何性能问题、优点/缺点或大小。

附件A

const a = require('模块');

附件B

const a = require('module').function;

Answer 1

Nodejs 中的

require 是:

Node.js follows the CommonJS module system, and the built-in require function is the easiest way to include modules that exist in separate files. The basic functionality of require is that it reads a javascript file, executes the file, and then proceeds to return the exports object.

因此，按照 require 所做的，它不会影响性能。

注意:

When You are using core Module like lodash then including the direct module its affect performance.

Because You see in lodash there are different file/folder for each function. So its always good practice to include only the function from module which is required.

示例:

const {get, isEmpty} = require('lodash');