replaced.js ( v, ...rules [ ArrayOf[ pattern, replaceWith, optionalRegExpFlags] ] ) -- flexible multiple string replacements (Flags default = "g")

replaced.js

// replaced.js ( v: any, ...rules: Array of [pattern: any, replaceWith: string | function, optionalRegExpFlags: string | null | undefined] )

const replaced = (v, ...rules) => {
  return rules.reduce( (acc, rule) => (
    acc.replace(
      RegExp( rule[0], rule[2] == null ? "g" : rule[2] ),
      rule[1]
    )
  ), String( v ?? "" ) );
};

// Usage: console.log( replaced('hello happy world, hello world.', ['hello', 'hi'], ['world', 'planet', null], ['h', 'H', ""] ) === "Hi happy planet, hi planet." );
// Usage: console.log( replaced(1.2300, [/\d/, "[$&]"]) === "[1].[2][3]" );