Remove nulls/undefineds so isEqual works

removeNulls.js

function removeNulls(obj, level = 0) {
  if (level > 10) {
    return obj;
  }
  if (obj === null || obj === undefined) {
    return undefined;
  }
  if (Array.isArray(obj)) {
    return obj.map(v => removeNulls(v, level + 1)).filter(v => v !== null && v !== undefined);
  }

  if (typeof obj === 'object') {
    const newObject = {};
    Object.keys(obj || {}).forEach(key => {
      const newValue = removeNulls(obj[key], level + 1);
      if (newValue !== null && newValue !== undefined) {
        newObject[key] = newValue;
      }
    });
    return newObject;
  }

  return obj;
}