Aug 3, 2025 · The following guidelines cover writing JavaScript example code for MDN Web Docs. This article is a list of rules for writing concise examples that will be understandable by as many people as …

Nov 7, 2025 · This article introduces tips and techniques for optimizing JavaScript to enhance the performance of your website.

Sep 29, 2025 · To put it another way, it is important that you consider some best practice advice to make sure that your use of CSS and JavaScript doesn't ruin the accessibility of your documents.

Nov 7, 2025 · The JavaScript Guide shows you how to use JavaScript and gives an overview of the language. If you need exhaustive information about a language feature, have a look at the JavaScript …

Oct 5, 2025 · In this article, we discuss the various loading metrics, animation, and responsiveness metrics, along with best practices to improve user perception, if not the actual timings.

Oct 30, 2025 · There are many reasons why your website should perform as well as possible. Below is a quick review of best practices, tools, APIs with links to provide more information about each topic.

Oct 2, 2025 · JavaScript frameworks are an essential part of modern front-end web development, providing developers with tried and tested tools for building scalable, interactive web applications.

Sep 19, 2025 · JavaScript supports a compact set of statements, specifically control flow statements, that you can use to incorporate a great deal of interactivity in your application. This chapter provides …

The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.

Understand the different types of JavaScript errors, for example, syntax errors and logic errors. Learn about the common types of JavaScript error messages and what they mean.