[英]Why is a variable assigned 'this' in module.export function in javascript
[英]Javascript module.export struct of function pointers
當我運行節點應用程序時,我得到以下內容:
Error: Route.post() requires callback functions but got a [object Undefined]
我的app.js文件中有以下內容:
const express = require('express')
const path = require('path')
const port = process.env.PORT || 3000
const app = express()
// imports
var bodyParser = require('body-parser');
var api = require('./api/controllers/apiController.js');
// serve static assets normally
app.use(express.static(__dirname + '/public'))
// support json encoded bodies
app.use(bodyParser.json());
// support encoded bodies
app.use(bodyParser.urlencoded({ extended: true }));
console.log(api);
app.post('/api/newFoo', api.newFoo);
在我的apiController文件中,我導出以下內容:
function newFoo(req, res, next) {
}
function getFoo(req, res, next) {
}
function newBar(req, res, next) {
}
function getBar(req, res, next) {
}
module.exports = {
newFoo: newFoo,
getFoo: getFoo,
newBar: newBar,
getBar: getBar
};
將我的函數導出為字典時,我做錯了什么?它們不被識別為函數指針?
當我為每個函數執行以下操作時,它工作正常:
module.exports.newFoo = function(req, res, next) {};
我的console.log(api.newFoo)的控制台輸出是[Function]並給我typeof為“function”但是原始方法導致[newFoo:Function]返回typeof為“undefined”
運行在{node server.js}上的server.js主文件
`const express = require('express')
const path = require('path')
const port = process.env.PORT || 3000
const app = express()
var bodyParser = require('body-parser');
var api = require('./apiController.js');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
console.log(api.getFoo); //--->[Function: newFoo] worked for me
console.log(typeof(api.getFoo)); //===> function
app.post('/api/getFoo', api.getFoo);
app.listen(port) `
通過聽一個端口嘗試過郵差,它也適合我
這是服務器上需要的apiController.js文件
function getFoo(req, res, next) {
console.log("2st function");
}
module.exports = {
getFoo: getFoo
}
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