Question

我们可以在Node.js中使用require()函数的不同方法有哪些他们之间有什么区别？例如，

const colors = require('colors');：我知道，这会查找node_modules目录中的包。
const colors = require('./colors');
const colors = require('/colors');
const Datastore = require('@google-cloud/datastore');
const square = require('lib').square;
const ep = require('./routes')(app);
const { red, blue, pink } = require('colors');
还包括其他类型的用法，不在上面的列表中。

Answer 1

要求（＆＃39; ./ colors＆＃39;）在文件所在的同一文件夹中查找colors.js。在大多数其他情况下，您列出的参数只是文件的路径。

接下来与需求行为无关

const square = require('lib').square; //is same as
const lib = require('lib');           //1. get lib object
const square = lib.square             //2. access its property 

const ep = require('./routes')(app);    //is same as
const routesFunc = require('./routes'); //1. in routes file exports object is function
const ep = routesFunc(app);             //2.execute function with parameter

const { red, blue, pink } = require('colors'); // same as previous
const colors = require('colors);               //looks for color in node modules and returs colors object
const {red, blue, pink} = colors;              //es6 feature. Same as 
const red = colors.red;
const blue = colors.blue; 
const pink = colors.pink

在node.js中使用require（）函数有哪些不同的方法？

1 个答案: