elrrrrrrr elrrrrrrr

## Hoisting
var v='Hello World';
(function(){
    alert(v);
    var v='I love you';
})()

var v='Hello World';
(function(){
    var v;
    alert(v);

## 处理条件判断
//jade 通过缩进行条件判断，所以需要使用三元表达式进行简单的class添加

ul.ul-con(class=isAdd?'add':'disadd')


## js in brower
// 解决隐私模式下 localStorage 不正常问题
;(function() {
  var KEY = '_localStorage_'
    , VALUE = 'test';

  // 检测是否正常
  try {
    localStorage.setItem(KEY, VALUE);
  } catch(e) {
    var noop = function() {};

## 加载
var mod = require('module');

module.exports = function module_exist(name){
  /**
   * This is UGLY but since we're not allowed to require 'native_module'
   * this is the only way to test if a native module (or non-native module) exist.
   */
  try{
    require(name);
  } catch(err){

## hover 菜单
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Show Hide Dropdown Using CSS</title>
<style type="text/css">
    ul{
        padding: 0;
        list-style: none;
    }

## JS Event
function addListener(target, type, handler) {
  if (target.addEventListener) {
    target.addEventListener(type, handler, false)
  } else if (target.attachEvent) {
    target.attachEvent("on" + type , handler);
  } else {
    target["on" + type] = handler;
  }
}

## async load template
function loadDialog(name, oncomplete) {
  var xhr = new XMLHttpRequest();
  xhr.open("get", "/js/dialog/" + name, true);

  xhr.onreadystatechange = function(){
    if (xhr.readyState == 4 && xhr.status == 200){

      var div = document.getElementById("dlg-holder");
      div.innerHTML = xhr.responseText;
      oncomplete();

## get the type of reference type
function getType(foo, type) {
  return Object.prototype.toString.call(foo) == "[Object " + type + "]"
}

//ES5 Array 有isArray方法

function isArray(value) {
  if (typeof Array.isArray === "function") {
    return Arrary.isArray(value);
  } else {

## hasProperty
// 好的写法
if ('count' in object)

//判断DOM对象 IE8之前 DOM对象不从Object对象继承 需要判断

//判断实例需要使用hasOwnProperty

if (object.hasOwnProperty("related")) {
  //非dom对象
}

## MyError
function MyError(code, message) {
  this.code = code;
  this.message = message;
}

MyError.prototype = new Error();
	var v='Hello World';
	(function(){
	alert(v);
	var v='I love you';
	})()

	var v='Hello World';
	(function(){
	var v;
	alert(v);
	//jade 通过缩进行条件判断，所以需要使用三元表达式进行简单的class添加

	ul.ul-con(class=isAdd?'add':'disadd')
	// 解决隐私模式下 localStorage 不正常问题
	;(function() {
	var KEY = '_localStorage_'
	, VALUE = 'test';

	// 检测是否正常
	try {
	localStorage.setItem(KEY, VALUE);
	} catch(e) {
	var noop = function() {};
	var mod = require('module');

	module.exports = function module_exist(name){
	/**
	* This is UGLY but since we're not allowed to require 'native_module'
	* this is the only way to test if a native module (or non-native module) exist.
	*/
	try{
	require(name);
	} catch(err){
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Show Hide Dropdown Using CSS</title>
	<style type="text/css">
	ul{
	padding: 0;
	list-style: none;
	}
	function addListener(target, type, handler) {
	if (target.addEventListener) {
	target.addEventListener(type, handler, false)
	} else if (target.attachEvent) {
	target.attachEvent("on" + type , handler);
	} else {
	target["on" + type] = handler;
	}
	}
	function loadDialog(name, oncomplete) {
	var xhr = new XMLHttpRequest();
	xhr.open("get", "/js/dialog/" + name, true);

	xhr.onreadystatechange = function(){
	if (xhr.readyState == 4 && xhr.status == 200){

	var div = document.getElementById("dlg-holder");
	div.innerHTML = xhr.responseText;
	oncomplete();
	function getType(foo, type) {
	return Object.prototype.toString.call(foo) == "[Object " + type + "]"
	}

	//ES5 Array 有isArray方法

	function isArray(value) {
	if (typeof Array.isArray === "function") {
	return Arrary.isArray(value);
	} else {
	// 好的写法
	if ('count' in object)

	//判断DOM对象 IE8之前 DOM对象不从Object对象继承需要判断

	//判断实例需要使用hasOwnProperty

	if (object.hasOwnProperty("related")) {
	//非dom对象
	}
	function MyError(code, message) {
	this.code = code;
	this.message = message;
	}

	MyError.prototype = new Error();