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- Web API
CSS 自定义高亮 API
CSS 自定义高亮 API 提供了一种方法，可以通过使用 JavaScript 创建范围并使用 CSS 定义样式来设置文档中任意文本范围的样式。
- Web API
服务器计时
服务器计时是性能 API 的组成部分，允许服务器向用户代理传递请求——响应周期的指标数据。你可以收集这些信息，并像处理性能 API 中的其他指标那样，根据服务器指标采取相应措施。
- JavaScript
JavaScript resource management
This guide talks about how to do resource management in JavaScript. Resource management is not exactly the same as memory management, which is a more advanced topic and usually handled automatically by JavaScript. Resource management is about managing resources that are not automatically cleaned up by JavaScript. Sometimes, it's okay to have some unused objects in memory, because they don't interfere with application logic, but resource leaks often lead to things not working, or a lot of excess memory usage. Therefore, this is not an optional feature about optimization, but a core feature to write correct programs!
Latest news
- developer.mozilla.org
Launching MDN's new front end
MDN is getting a facelift 🎉. Discover what's changed, what's improved, and how navigating the site just got smoother.
- developer.mozilla.org
Image formats: Pixel data from encoders to decoders
From individual pixels to fully decoded images on your screen, raw pixel data gets transformed, compressed, and efficiently delivered. Learn about the techniques and optimizations that shrink image information without any perceivable loss in quality.
- developer.mozilla.org
Image formats: Color models for humans and devices
Images help bring more color and life to the web. This post describes how images are represented by humans and on different devices, with details about color spaces and vision theory.
- developer.mozilla.org
Default styles for h1 elements are changing
Browsers are starting to roll out changes in default UA styles for nested section headings. This post describes the incoming changes, how to identify if it's an issue on your websites, and hints for conformant and better-structured pages.
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