node.js 模块是一种包，其中包含某些供导入它们的人使用的函数或方法。网络上提供了一些模块供开发人员使用，例如 fs、fs-extra、crypto、stream 等。您也可以制作自己的包并在代码中使用它。
exports.function_name = function(arg1, arg2, ....argN) { // Put your function body here... };
创建两个名为 calc.js 和 index.js 的文件，并复制以下代码片段。
calc.js 是自定义节点将保存节点功能的模块。
index.js 将导入 calc.js 并在节点进程中使用它。
calc.js< /p>
//Creating a custom node module // And making different functions exports.add = function (a, b) { return a + b; // Adding the numbers }; exports.sub = function (a, b) { return a - b; // Subtracting the numbers }; exports.mul = function (a, b) { return a * b; // Multiplying the numbers }; exports.div = function (a, b) { return a / b; // Dividing the numbers };
index.js
// Importing the custom node module with the below statement var calculator = require('./calc'); var a = 21 , b = 67 console.log("Addition of " + a + " and " + b + " is " + calculator.add(a, b)); console.log("Subtraction of " + a + " and " + b + " is " + calculator.sub(a, b)); console.log("Multiplication of " + a + " and " + b + " is " + calculator.mul(a, b)); console.log("Division of " + a + " and " + b + " is " + calculator.div(a, b));
C:\homeode>> node index.js Addition of 21 and 67 is 88 Subtraction of 21 and 67 is -46 Multiplication of 21 and 67 is 1407 Division of 21 and 67 is 0.31343283582089554
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