@wcagc/source-tag

A zero-runtime Vite plugin that adds deterministic data-wcagc-src="relative/file.tsx:line:column" attributes to lowercase JSX host elements. The wcagc browser extension can display those build facts without guessing a source file.

Source, tests, and CI are published at WCAG-Compliance/wcagc-source-tag under the MIT license.

import { defineConfig } from "vite";
import sourceTag from "@wcagc/source-tag";

export default defineConfig({ plugins: [sourceTag()] });

The plugin applies only to Vite's development server by default. For a controlled staging build, use sourceTag({ includeInBuild: true }). This exposes relative repository paths in rendered markup; assess that disclosure before enabling it. root, include, exclude, and attribute can be customized. Generated maps use only the validated relative source path and do not embed source content. No absolute path is emitted and no runtime code is added.