DOM is an essential component of web programming. It stands for Document Object Model and is a cross-platform, language-independent convention for representing and interacting with objects in HTML, XHTML, and XML documents. As an object-oriented representation of the web page, it allows scripts a...
part2-3 web API简介-DOM 【Web API简介】 API的概念 • API(Application Programming Interface,应用程序编程接口)是一些预先定义的函数, 目的是提供应用程序与开发人员基于某软件或硬件得以访问一组例程的能力,而又无需访问源码,或理解内部工作机制的细节。 • 任何开发语言都有自己的 API • API 的特征输入...
The DOM is the foundation of the web platform programming model, and its design and performance impacts the rest of the browser pipeline. However, its history and evolution is far from a simple story. Over the past three years, we’ve embarked on an in-flight refactoring of the DOM in Mi...
音频和视频API例如HTMLMediaElement,Web Audio API和WebRTC允许您使用多媒体来做一些非常有趣的事情,比如创建用于播放音频和视频的自定义UI控件,显示字幕字幕和您的视频,从网络摄像机抓取视频,通过画布操纵(见上),或在网络会议中显示在别人的电脑上,或者添加效果到音轨(如增益,失真,平移等) 。 设备API基本上是以对...
JavaScript是一个完备的编程语言,用其他语言能做的事情用JavaScript同样能够做到,甚至还能做的更多,因为我们就在Web页面内部编程。你可以要求JavaScript: 1. 建立一个语句 创建一个变量并赋值、让变量相加、完成计算,还可以使用一个JavaScript库的内置功能。
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Hopefully, you see why the Document Object Model is so central to modern websites. Without it, JavaScript wouldn’t be able to alter web pages in cool ways — we’d just have a slew of boring, static web pages. You’ll never need to worry about programming a...
You should generally check the origin field when receiving messages to make sure that the data was sent from a website that you trust to some degree. Where possible, you should also check any received data for validity before using it. In particular, you should generally avoi...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
in Pingdom Products, Website MonitoringAn API, application programming interface, is a collection of tools, protocols, and subroutines that can be used when building software programs or applications. APIs makes software development easier by providing reusable components and a set of clearly defined ...