Node.js 定義和引用模組

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定義一個Node模組：currency.js

var canadianDollar = 0.91;function roundTwoDecimals(amount) {    return Math.round(amount * 100) / 100;}exports.canadianToUS = function (canadian) {    return roundTwoDecimals(canadian * canadianDollar);}exports.USToCanadian = function (us) {    return roundTwoDecimals(us / canadianDollar);}

引入一個模組：

下面的test-currency.js中的代碼，它require了currency.js模組：

var currency = require(‘./currency‘);console.log(‘50 Canadian dollars equals this amount of US dollars:‘);console.log(currency.canadianToUS(50));console.log(‘30 US dollars equals this amount of Canadian dollars:‘);console.log(currency.USToCanadian(30));

輸出結果：

50 Canadian dollars equals this amount of US dollars:45.530 US dollars equals this amount of Canadian dollars:32.97

 

Node.js 定義和引用模組