MicrosoftWord-高性能JavaScript编程.doc - (EPUB全文下载)

文件大小:2.43 mb。
文件格式:epub 格式。
书籍内容:

目录
第一章 Loading and Execution 加载和运行...... 2
第二章 Data Access 数据访问........... 26
第三章 DOM Scripting DOM 编程.......... 56
第四章 Algorithms and Flow Control 算法和流程控制.... 104
第五章 Strings and Regular Expressions 字符串和正则表达式.... 139
第六章 Responsive Interfaces 响应接口.............. 184
第七章 Ajax 异步 JavaScript 和 XML............... 216
第八章 Programming Practices 编程实践................... 261
第九章 Building and Deploying High-Performance JavaScript Applications 构建和部
署高性能 JavaScript 应用 ... 279
第十章 Tools 工具................ 306
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第一章 Loading and Execution
加载和运行
JavaScript performance in the browser is arguably the most important usability issue facing developers. The problem is complex because of the blocking nature of JavaScript, which is to say that nothing else can happen while JavaScript code is being executed. In fact, most browsers use a single process for both user interface (UI) updates and JavaScript execution, so only one can happen at any given moment in time. The longer JavaScript takes to execute, the longer it takes before the browser is free to respond to user input.
JavaScript 在浏览器中的性能,可认为是开发者所要面对的最重要的可用性问题。此问题因 JavaScript
的阻塞特征而复杂,也就是说,当 JavaScript 运行时其他的事情不能被浏览器处理。事实上,大多数浏览
器使用单进程处理 UI 更新和 JavaScript 运行等多个任务,而同一时间只能有一个任务被执行。JavaScript
运行了多长时间,那么在浏览器空闲下来响应用户输入之前的等待时间就有多长。
On a basic level, this means that the very presence of a



When the browser encounters a