simple recursive matching

equals.js

const equals = ( a, b ) => {
  if ( typeof a === 'object' && typeof b === 'object' && a !== null && b !== null ) {
    for ( let k of Object.keys( a )) {
      if ( !equals( a[ k ], b[ k ])) {
        return false;
      }
    }

    return true;
  }

  return a === b;
}