[英]How to correctly export and require in node js?
我閱讀了有關在node / express中導出/要求的教程,並想知道是否有人可以用我的示例向我解釋:為什么我在app.js中的路由不起作用? 我需要出口什么才能使其正常運轉? 非常感謝!
index.js:
'use strict'
var express = require('express');
var app = express();
module.exports = app;
var PORT = process.env.PORT || 1337;
app.listen(PORT, function() {
console.log('Server is listening!');
})
app.js:
var express = require('express');
var bodyParser = require('body-parser');
var path = require('path');
var app = express();
//var app=require('./index.js');
module.exports = function() {
app.use(express.static(path.join(__dirname, '../public')));
app.use(express.static(path.join(__dirname, '../browser')));
}
var app = express()
中都聲明了兩個單獨的Express服務器。 但是無論如何,如果您想使用此示例並使它工作,請以這種方式進行操作:
./ index.js
'use strict'
var express = require('express');
var setupServing = require('./setupServing.js'); //import our function
var PORT = process.env.PORT || 1337;
var app = express(); //create express app
setupServing(app); //call imported function to config our app
app.listen(PORT, function() { //start
console.log('Server is listening!');
})
./ setupServing.js
var express = require('express');
var path = require('path');
//export function which can configure static serve for app
module.exports = function(app) { //take app as an argument
app.use(express.static(path.join(__dirname, '../public')));
}
請注意,此示例仍然不夠邏輯,我認為您不會在任何實際項目中遇到此類代碼,但是無論如何它將起作用並演示在nodejs中進行導出/請求。
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