JAVASCRIPT isPotentiallyValidKeyRange.js

import FDBKeyRange from "../FDBKeyRange.js";
import valueToKeyWithoutThrowing, { INVALID_TYPE } from "./valueToKeyWithoutThrowing.js";

// https://www.w3.org/TR/IndexedDB/#is-a-potentially-valid-key-range
const isPotentiallyValidKeyRange = value => {
  // If value is a key range, return true.
  if (value instanceof FDBKeyRange) {
    return true;
  }

  // Let key be the result of converting a value to a key with value.
  const key = valueToKeyWithoutThrowing(value);

  // If key is "invalid type" return false.
  // Else return true.
  return key !== INVALID_TYPE;
};
export default isPotentiallyValidKeyRange;