nodejs中函数的调用实例详解

一、调用本js文件中的函数

var http = require('http');
http.createServer(function (request,response){
 response.writeHead(200, {'Contet-Type':'text/html;charset=utf-8'});
 
 if(request.url!=='/favicon.ico'){
 funl(response);
 response.end('');
 } 
}).listen(8000);
console.log('Server running at http://127.0.0.1:8000/');
function funl(res){
 console.log('fun1');
 res.write('hello ,我是fun1');
}

运行结果：

二、调用外部的js文件

function fun2(res){
 console.log('我是,fun2');
 res.write('你好我是fun2');
}
// 想把此js声明为一个函数，加下面代码，只适用于文件中只有一个函数
module.exports = fun2;
var http = require('http');
// ortherFun 就代替了fun2
var ortherFun = require('./../otherjs/out.js');
http.createServer(function (request,response){
 response.writeHead(200, {'Contet-Type':'text/html;charset=utf-8'});
 
 if(request.url!=='/favicon.ico'){
 // funl(response);
 ortherFun(response);
 response.end('');
 } 
}).listen(8000);
console.log('Server running at http://127.0.0.1:8000/');
function funl(res){
 console.log('fun1');
 res.write('hello ,我是fun1');
}

外部js文件内有多个函数

// 支持多个函数
module.exports={
 fun2:function(res){
 console.log('我是fun2');
 res.write('你好，我是fun2');
 },
 fun3:function(res){
 console.log('我是fun3');
 res.write('你好，我是fun3');
 }
}
var http = require('http');
var ortherFun = require('./../otherjs/out.js');
http.createServer(function (request,response){
 response.writeHead(200, {'Contet-Type':'text/html;charset=utf-8'});
 
 if(request.url!=='/favicon.ico'){
 // funl(response);
 // ortherFun(response);
 ortherFun.fun2(response);
 ortherFun.fun3(response);
 response.end('');
 } 
}).listen(8000);
console.log('Server running at http://127.0.0.1:8000/');
function funl(res){
 console.log('fun1');
 res.write('hello ,我是fun1');
}

用字符串调用对应的函数

var http = require('http');
var ortherFun = require('./../otherjs/out.js');
http.createServer(function (request,response){
 response.writeHead(200, {'Contet-Type':'text/html;charset=utf-8'});
 
 if(request.url!=='/favicon.ico'){
 // funl(response);
 // ortherFun(response);
 //ortherFun.fun2(response);
 //ortherFun.fun3(response);
 
 // 用字符串调用对应的函数
 //ortherFun['fun2'](response);
 //ortherFun['fun3'](response);
    // 还可以写成下面这样
    funname = 'fun2';
    ortherFun[funname](response);
 response.end('');
 } 
}).listen(8000);
console.log('Server running at http://127.0.0.1:8000/');
function funl(res){
 console.log('fun1');
 res.write('hello ,我是fun1');
}

总结

以上所述是小编给大家介绍的nodejs中函数的调用实例详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对三水点靠木网站的支持！