Disparity is a Node.js library that generates colorized string diffs for text or code spanning multiple lines, ideal for displaying changes between files in a readable format. It wraps the `diff` and `ansi-styles` packages, adding line numbers and context, and replaces invisible characters like `\r`, `\n`, and `\t` with visible markers. This tool is designed for developers who need to visualize differences in source files, particularly those working with code formatters or other tools that require clear, formatted diffs.