unicode-helpers.js

const combiningMarks = /([\0-\u02FF\u0370-\u1AAF\u1B00-\u1DBF\u1E00-\u20CF\u2100-\uD7FF\uE000-\uFE1F\uFE30-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF])([\u0300-\u036F\u1AB0-\u1AFF\u1DC0-\u1DFF\u20D0-\u20FF\uFE20-\uFE2F]+)/gmi;

/**
Remove unicode combining symbols. 
Will convert the following string: Z͑ͫ̓ͪ̂ͫ̽͏̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ͫ͗͢L̠ͨͧͩ͘G̴̻͈͍͔̹̑͗̎̅͛́Ǫ̵̹̻̝̳͂̌̌͘!͖̬̰̙̗̿̋ͥͥ̂ͣ̐́́͜͞
Into: ZALGǪ!
*/
export const removeCombiningMarks = (input) => {
  return input.replace(combiningMarks, (substr, ...args) => {
    // console.log(args);
    return args[0]
  });
}