30-seconds-of-code/snippets/unescapeHTML.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Unescape HTML	string,browser,regexp	beginner	2017-12-29T15:09:10+02:00	2020-10-22T20:24:44+03:00

Unescapes escaped HTML characters.

• Use String.prototype.replace() with a regexp that matches the characters that need to be unescaped.
• Use the function's callback to replace each escaped character instance with its associated unescaped character using a dictionary (object).

const unescapeHTML = str =>
  str.replace(
    /&|<|>|'|"/g,
    tag =>
      ({
        '&': '&',
        '&lt;': '<',
        '&gt;': '>',
        '&#39;': "'",
        '&quot;': '"'
      }[tag] || tag)
  );

unescapeHTML('<a href="#">Me & you</a>');
// '<a href="#">Me & you</a>'