import { postcss } from "https://deno.land/x/deno_bundler@v0.9.1/deps.ts";
const { CssSyntaxError } = postcss;
Returns error position, message and source code of the broken part.
error.toString() //=> "CssSyntaxError: app.css:1:1: Unclosed block
// > 1 | a {
// | ^"