Learn how to use JavaScript’s fs library module to create, read, write, and stream common file types in the JavaScript runtimes Node, Deno, and Bun.

The latest JavaScript specification standardizes a well-balanced and thoughtful set of features, including the built-in global Iterator, new Set methods, improvements to regular expressions, and more.

Attackers frequently send malicious JavaScript files through bogus emails. It's easy to block these files from reaching a hapless user. Here's how.