is-absolute
Returns true if a file path is absolute. Does not rely on the path module and can be used as a polyfill for node.js native `path.isAbolute`.
upath2
A proxy to `path`, replacing `\` with `/` for all results
eslint-plugin-typescript-paths
ESLint Plugin that includes rules which encourage the use of absolute paths over relative paths, defined by paths or baseUrl from tsconfig.json