KJlmfe

var http = require('http'); //导入内置模块http

//调用内置模块http提供的createServer的API
http.createServer(function (req, res) { 
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, '127.0.0.1');

console.log('Server running at http://127.0.0.1:1337/');

KJlmfe

var fs = require('fs');
 
//异步读取Hello.txt
fs.readFile('Hello.txt','utf-8', 
  //回调函数里输出Hello.txt里的内容
  function(err, data){
    console.log(data);  
  }
);
 

KJlmfe

var fs = require('fs');
//同步读取文件内容
var data = fs.readFileSync('Hello.txt','utf-8');
 
console.log(data);
console.log('End');
 
/*
运行结果：
Hello World

KJlmfe

/* JavaScript 单体模式 - 最基本结构的单体 */

var Singleton = {

    attribute1: "public attribute 1",

    method1: function() {
      console.log("This is public method1");
      // 不保险 若Singleton.method1作为一个事件监听器，那么this就会指向window
      console.log(this.attribute1);

KJlmfe

//父构造函数
function CarMaker() { }

//所有子类通用方法
CarMaker.prototype.drive = function () {
  console.log( "Vroom, I have " + this.doors + " doors");
};

//静态工厂方法 子类无法继承
CarMaker.factory = function(type) {

KJlmfe

//父构造函数
function CarMaker() { }

//所有子类通用方法
CarMaker.prototype.drive = function () {
  console.log( "Vroom, I have " + this.doors + " doors");
};

//静态工厂方法 子类无法继承
CarMaker.factory = function(type) {

KJlmfe

var SimpleHandler = function() { };

SimpleHandler.prototype = {
  request: function(method, url, callback, postVars) {
    var xhr = this.createXhrObject();
    xhr.onreadystatechange = function() {
      // do some things
    };
    xhr.open(method. url, true);
    xhr.send(postVars);

KJlmfe

//旧的第三方代码
function getSomething(str1, str2, str3) {
  // do some thing
  console.log("Old getSomething");
  return str1 + str2 + str3;
}

//自己的代码
var str1 = "a",
    str2 = "b",

KJlmfe

var getName = function(){
  return "Bob";
}
var getSex = function(){
  return "man";
}

var getUserInfo = function(){
  var info = getName() + getSex();
  return info;

KJlmfe

var myevent = {
  // ...
  stop: function (e) {
    //其他
    if(typeof e.preventDefault === "function") {
      e.preventDefault();
    }
    if(typeof e.stopPropagation === "function") {
      e.stopPropagation();
    }