markup.ts

// This escapeHtml utility is based on https://github.com/zertosh/htmlescape
// License: https://github.com/zertosh/htmlescape/blob/0527ca7156a524d256101bb310a9f970f63078ad/LICENSE

// We've chosen to inline the utility here to reduce the number of npm dependencies we have,
// slightly decrease the code size compared the original package and make it esm compatible.

const ESCAPE_LOOKUP: { [match: string]: string } = {
  "&": "\\u0026",
  ">": "\\u003e",
  "<": "\\u003c",
  "\u2028": "\\u2028",
  "\u2029": "\\u2029",
};

const ESCAPE_REGEX = /[&><\u2028\u2029]/g;

export function escapeHtml(html: string) {
  return html.replace(ESCAPE_REGEX, (match) => ESCAPE_LOOKUP[match]);
}