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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge" >
<link rel="dns-prefetch" href="https://millionqw.github.io">
<title>Million</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="description" content="广东金融学院15级，前端打字员">
<meta name="keywords" content="前端,js,javascript,html5,css3,开发者,程序猿,编程,开源,Developer,Programmer,Coder,html,css">
<meta property="og:type" content="website">
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<meta name="twitter:description" content="广东金融学院15级，前端打字员">
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<link rel="stylesheet" type="text/css" href="/./main.b3331d.css">
<style type="text/css">
#container.show {
background: linear-gradient(200deg,#a0cfe4,#e8c37e);
}
</style>
</head>
<body>
<div id="container" q-class="show:isCtnShow">
<canvas id="anm-canvas" class="anm-canvas"></canvas>
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</a>
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</hgroup>
<p class="header-subtitle">My freestyle</p>
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<h1 class="header-author js-header-author">million</h1>
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<nav class="header-nav">
<div class="social">
<a class="github" target="_blank" href="https://github.com/MillionQW" title="github"><i class="icon-github"></i></a>
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</div>
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<li style="width: 50%"><a href="/">主页</a></li>
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</ul>
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<canvas data-colors="#eaeaea" data-sectionHeight="100" data-contentId="js-content" id="myCanvas1" class="anm-canvas"></canvas>
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<article id="post-《JavaScript高级程序设计》-第二十四章-最佳实践" class="article article-type-post article-index" itemscope itemprop="blogPost">
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/12/15/《JavaScript高级程序设计》-第二十四章-最佳实践/">《JavaScript高级程序设计》 第二十四章 最佳实践</a>
</h1>
<a href="/2017/12/15/《JavaScript高级程序设计》-第二十四章-最佳实践/" class="archive-article-date">
<time datetime="2017-12-15T14:13:57.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2017-12-15</time>
</a>
</header>
<div class="article-entry" itemprop="articleBody">
<div><br><span><div><b>24.1可维护性</b></div><div><b>24.1.1什么是可维护的代码</b></div><div>可维护的代码遵循以下特点：</div><div><b>·</b>可理解性</div><div><b>·</b>直观性</div><div><b>·</b>可适应性——代码以一种数据上的变化不要求完全重写的方法撰写。</div><div><b>·</b>可扩展性——在代码架构上已考虑到在未来允许对核心功能进行扩展。</div><div><b>·</b>可调试性——当代码出错时，代码可以给予你足够的信息来尽可能直接地确定问题所在。</div><div><br></div><div>对于专业人士而言，能写出可维护的JavaScript代码是非常重要的技能。<br><br><br>
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十四章-最佳实践/#more">more >></a>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<i class="icon-price-tags icon"></i>
<ul class="article-tag-list">
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color3">前端</a>
</li>
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Javascript</a>
</li>
</ul>
</div>
<p class="article-more-link">
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十四章-最佳实践/">展开全文 >></a>
</p>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-《JavaScript高级程序设计》-第二十三章-离线应用与客户端存储" class="article article-type-post article-index" itemscope itemprop="blogPost">
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/12/15/《JavaScript高级程序设计》-第二十三章-离线应用与客户端存储/">《JavaScript高级程序设计》 第二十三章 离线应用与客户端存储</a>
</h1>
<a href="/2017/12/15/《JavaScript高级程序设计》-第二十三章-离线应用与客户端存储/" class="archive-article-date">
<time datetime="2017-12-15T14:13:21.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2017-12-15</time>
</a>
</header>
<div class="article-entry" itemprop="articleBody">
<div><br><span><div>拖了这么久，第二十二章用了9天！赶紧第二十三章开始。</div><div><br></div><div>支持<span style="color: rgb(235, 0, 115);">离线Web应用</span>开发是HTML5的另一个重点。所谓离线Web应用，就是在设备不能上网的情况下仍然可以运行的应用（Web APP？）HTML5把离线应用作为重点，主要是基于开发人员的心愿。前端开发人员一直希望Web应用能够与传统的客户端应用同场竞技，起码做到只要<span style="color: rgb(235, 0, 115);">设备有电就能使用</span>。</div>
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十三章-离线应用与客户端存储/#more">more >></a>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<i class="icon-price-tags icon"></i>
<ul class="article-tag-list">
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color3">前端</a>
</li>
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Javascript</a>
</li>
</ul>
</div>
<p class="article-more-link">
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十三章-离线应用与客户端存储/">展开全文 >></a>
</p>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-《JavaScript高级程序设计》-第二十二章-高级技巧" class="article article-type-post article-index" itemscope itemprop="blogPost">
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/12/15/《JavaScript高级程序设计》-第二十二章-高级技巧/">《JavaScript高级程序设计》 第二十二章 高级技巧</a>
</h1>
<a href="/2017/12/15/《JavaScript高级程序设计》-第二十二章-高级技巧/" class="archive-article-date">
<time datetime="2017-12-15T14:13:03.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2017-12-15</time>
</a>
</header>
<div class="article-entry" itemprop="articleBody">
<div><br><span><div>JavaScript是一种极其灵活的语言，具有多种使用风格。一般来说，编写JavaScript要么使用过程方式，要么使用面向对象方式。然而，由于它天生的动态属性，这种语言还能使用更为复杂和有趣的模式。这些技巧要利用ECMAScript的语言特点、BOM扩展和DOM功能来获得强大的效果。</div><div><br></div><div><span style="font-size: 15px;"><b>22.1高级函数</b></span></div><div>函数是JavaScript中<span style="color: rgb(235, 0, 115);">最有趣</span>的部分之一。它们本质上是十分简单和过程化的，但也可以是非常复杂和动态的。一些额外的功能可以通过使用闭包来实现。此外，由于所有函数都是对象，所以使用<span style="color: rgb(235, 0, 115);">函数指针</span>非常简单。这些令JavaScript函数<span style="color: rgb(235, 0, 115);">不仅有趣而且强大</span><br><br>
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十二章-高级技巧/#more">more >></a>
</div>
<div class="article-info article-info-index">
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<ul class="article-tag-list">
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color3">前端</a>
</li>
<li class="article-tag-list-item">
<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Javascript</a>
</li>
</ul>
</div>
<p class="article-more-link">
<a class="article-more-a" href="/2017/12/15/《JavaScript高级程序设计》-第二十二章-高级技巧/">展开全文 >></a>
</p>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-《JavaScript高级程序设计》-第二十一章-Ajax与Comet" class="article article-type-post article-index" itemscope itemprop="blogPost">
<div class="article-inner">
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<h1 itemprop="name">
<a class="article-title" href="/2017/12/15/《JavaScript高级程序设计》-第二十一章-Ajax与Comet/">《JavaScript高级程序设计》 第二十一章 Ajax与Comet</a>
</h1>
<a href="/2017/12/15/《JavaScript高级程序设计》-第二十一章-Ajax与Comet/" class="archive-article-date">
<time datetime="2017-12-15T14:12:47.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2017-12-15</time>
</a>
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<div><br><span><div><span style="font-size: 15px;"><b>目录</b></span></div><div><b>21.1XMLHttpRequest对象</b></div><div style="margin-left:40px;">21.1.1XHR的用法</div><div style="margin-left:40px;">21.1.2HTTP头部信息</div><div style="margin-left:40px;">21.1.3GET请求</div><div style="margin-left:40px;">21.1.4POST请求</div><div><b>21.2XMLHttpRequest2级</b></div><div style="margin-left:40px;">21.2.1FormData</div><div style="margin-left:40px;">21.2.2超时设定</div><div><b>21.3进度事件</b></div><div style="margin-left:40px;">21.3.1load事件</div><div style="margin-left:40px;">21.3.2progress事件</div><div><b>21.4跨域资源共享</b></div><div>21.4.1IE对CORS的实现</div><div style="margin-left:40px;">21.4.2其他浏览器对CORS的实现</div><div style="margin-left:40px;">21.4.3Prefligted Requests</div><div style="margin-left:40px;">21.4.4带凭证的请求</div><div style="margin-left:40px;">21.4.5跨浏览器的CORS</div><div><b>21.5其他跨域技术</b></div><div style="margin-left:40px;">21.5.1图像Ping</div><div style="margin-left:40px;">21.5.2JSONP</div><div style="margin-left:40px;">21.5.3Comet</div><div style="margin-left:40px;">21.5.4服务器发送事件</div><div style="margin-left:80px;">1.SSE API</div><div style="margin-left:80px;">2.事件流</div><div style="margin-left:40px;">21.5.5Web Sockets</div><div style="margin-left:80px;">1.Web Sockets API</div><div style="margin-left:80px;">2.发送和接收数据</div><div style="margin-left:80px;">3.其他事件</div><div style="margin-left:40px;">21.5.6SSE与Web Sockets</div><div><b>21.6安全</b></div><div><br></div>
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<div><br><span><div><span style="font-size: 15px;"><b>目录</b></span></div><div><b>20.1语法</b></div><div style="margin-left:40px;">20.1.1简单值</div><div style="margin-left:40px;">20.1.2对象</div><div style="margin-left:40px;">20.1.3数组</div><div><b>20.2解析与序列化</b></div><div style="margin-left:40px;">20.2.1JSON对象</div><div style="margin-left:40px;">20.2.2序列化选项</div><div style="margin-left:80px;">1.过滤结果</div><div style="margin-left:80px;">2.字符串缩进</div><div style="margin-left:80px;">3.toJSON（）方法</div><div> 20.2.3解析选项</div>
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<p>内存泄漏：内存泄漏指由于错误或疏忽导致程序未能释放已经不再使用的内存，内存泄漏并非内存在物理上的消失，而是应用程序分配某段内存后，由于设计错误，导致在释放该内存之前就失去了对这段内存的控制，从而造成了内存的浪费。–<a href="https://zh.wikipedia.org/wiki/%E5%86%85%E5%AD%98%E6%B3%84%E6%BC%8F" target="_blank" rel="external">维基百科</a></p>
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<div><br><span><div><span style="font-size: 15px;"><b>目录</b></span></div><div><b>17.1浏览器报告的错误</b></div><div style="margin-left:40px;">17.1.1IE</div><div style="margin-left:40px;">17.1.2Firefox</div><div style="margin-left:40px;">17.1.3Safari</div><div style="margin-left:40px;">17.1.4Opera</div><div style="margin-left:40px;">17.1.5Chrome</div><div><b>17.2错误处理</b></div><div style="margin-left:40px;">17.2.1try-catch语句</div><div style="margin-left:80px;">1.finally子句</div><div style="margin-left:80px;">2.错误类型（RangeError、SyntaxError等错误类型）</div><div style="margin-left:80px;">3.合理使用try-catch语句</div><div style="margin-left:40px;">17.2.2抛出错误</div><div style="margin-left:80px;">1.抛出错误的时机</div><div style="margin-left:80px;">2.抛出错误与使用try-catch语句</div><div style="margin-left:40px;">17.2.3错误（error）事件</div><div style="margin-left:40px;">17.2.4处理错误的策略</div><div style="margin-left:40px;">17.2.5常见的错误类型</div><div style="margin-left:80px;">1.类型转换错误</div><div style="margin-left:80px;">2.数据类型错误</div><div style="margin-left:40px;"> 3.通信错误</div><div style="margin-left:40px;">17.2.6区分致命错误和非致命错误</div><div style="margin-left:40px;">17.2.7把错误记录到服务器</div><div><b>17.3调试技术</b></div><div style="margin-left:40px;">17.3.1将信息记录到控制台</div><div style="margin-left:40px;">17.3.2将消息记录到当前页面</div><div style="margin-left:40px;">17.3.3抛出错误</div><div><b>17.4常见的IE错误</b></div>
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<a href="/2017/12/10/《JavaScript高级程序设计》-第十六章-HTML5脚本编程/" class="archive-article-date">
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<div><br><span><div><b>目录</b></div><div><b>16.1跨文档消息传递</b>（postMessage（）方法。Message事件）</div><div><b>16.2原生拖放</b></div><div style="margin-left:40px;">16.2.1拖放事件</div><div style="margin-left:40px;">16.2.2自定义放置目标</div><div style="margin-left:40px;">16.2.3dataTransfer对象</div><div style="margin-left:40px;">16.2.4dropEffect与effectAllowed</div><div style="margin-left:40px;">16.2.5可拖动（draggable属性）</div><div style="margin-left:40px;">16.2.6其他成员</div><div><b>16.3媒体元素</b></div><div style="margin-left:40px;">16.3.1属性（<video>和<audio>元素的各种属性）</div><div style="margin-left:40px;">16.3.2事件（各种齐备的属性）</div><div style="margin-left:40px;">16.3.3自定义媒体播放器</div><div style="margin-left:40px;">16.3.4检测编解码器的支持情况</div><div style="margin-left:40px;">16.3.5Audio类型</div><div><b>16.4历史状态管理</b>（hashchange事件）</div><div><br></div>
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<div><br><span><div><span style="font-size: 15px;"><b>目录</b></span></div><div><b>15.1基本用法</b></div><div><b>15.2 2D上下文</b></div><div style="margin-left:40px;">15.2.1填充和描边</div><div style="margin-left:40px;">15.2.2绘制矩形</div><div style="margin-left:40px;">15.2.3绘制路径</div><div style="margin-left:40px;">15.2.4绘制文本</div><div style="margin-left:40px;">15.2.5变换</div><div style="margin-left:40px;">15.2.6绘制图像</div><div style="margin-left:40px;">15.2.7阴影</div><div style="margin-left:40px;">15.2.8渐变</div><div style="margin-left:40px;">15.2.9模式</div><div style="margin-left:40px;">15.2.10使用图像数据</div><div style="margin-left:40px;">15.2.11合成</div><div><b>15.3WebGL</b></div>
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<div><br><span><div><span style="font-size: 15px;"><b>14.1表单的基础知识</b></span></div><div>在HTML中，表单由<form>元素表示。而在JavaScript中，表单对应的则是<span style="color: rgb(235, 0, 115);">HTMLFormElement类型</span>。HTMLFormElement继承了<span style="color: rgb(235, 0, 115);">HTMLElement</span>（意思是说不止继承了HTMLElement类型吗？），所以与其他HTML元素一起具有相同的默认属性。不过HTMLFormElement也有它自己下列独有的属性和方法：</div><div>·acceptCharset：服务器能够处理的字符集；等价于<span style="color: rgb(235, 0, 115);">HTML的accept-charset特性</span>。</div><div>·action：接收请求的URL；等价于HTML中的action特性。</div><div>·elements：表单中<span style="color: rgb(235, 0, 115);">所有控件的集合（HTMLCollection）</span>。</div><div>·enctype：请求的编码类型，等价于HTML中的enctype特性。</div><div>·length：表单中<span style="color: rgb(235, 0, 115);">控件</span>的数量。</div><div>·method：要发送的HTTP请求类型，通常是“get”或“post”；等价于HTML的method特性。</div><div>·name：表单的名称，等价于HTML中的name特性。</div><div>·reset（）：表单重置为默认值。</div><div>·submit（）：提交表单。</div><div>target：用于发送请求和接收响应的<span style="color: rgb(235, 0, 115);">窗口名称</span>；等价于HTML中的target特性。</div><div><br></div><div>除了利用id获得表单元素，还可以通过<span style="color: rgb(235, 0, 115);">document.forms</span>取得页面中的所有表单。在这个集合中，可以通过数值索引或name值来取得特定的表单。也没说哪些浏览器支持啊。亲测，连IE5都支持。且document.forms是个<span style="color: rgb(235, 0, 115);">HTMLCollection类型</span>的属性，也就是说反复访问会有性能问题。</div><div><br></div>
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缺失模块。<br/>1、请确保node版本大于6.2<br/>2、在博客根目录（注意不是yilia根目录）执行以下命令：<br/> npm i hexo-generator-json-content --save<br/><br/>
3、在根目录_config.yml里添加配置：
<pre style="font-size: 12px;" q-show="jsonFail">
jsonContent:
meta: false
pages: false
posts:
title: true
date: true
path: true
text: false
raw: false
content: false
slug: false
updated: false
comments: false
link: false
permalink: false
excerpt: false
categories: false
tags: true
</pre>
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<div class="aboutme-wrap" id="js-aboutme">很惭愧<br><br>只做了一点微小的工作<br>谢谢大家</div>
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