glob

glob is a library for matching files using glob patterns — the wildcard syntax familiar from shell commands. The library supports standard glob features including * (match any characters except path separators), ** (match any characters including path separators for recursive directory traversal), ? (match a single character), [...] (character classes), and {a,b} (brace expansion). glob is the underlying pattern matching engine used by countless Node.js tools for file discovery, including test runners finding test files, build tools locating source files, and linters discovering files to check. The library provides both callback and promise-based APIs, with options for ignoring patterns, following symlinks, case-insensitive matching, dot file inclusion, and result sorting. glob v10+ is a complete rewrite with significantly improved performance, featuring a walk-based approach that reduces filesystem calls. The library handles platform-specific path separators and provides both absolute and relative path output. While fast-glob and globby have gained popularity as faster alternatives with more features, glob remains the most widely used file matching library in the Node.js ecosystem.