Function validateAndSet

react/src/hooks.ts:278–303

* Validates the value. If it fails, it calls the function in the second * Argument. Pass null to remove existing value.

(newVal: JSONValue)

   * Argument. Pass null to remove existing value.
   */
  async function validateAndSet(newVal: JSONValue): Promise<void> {
    if (newVal == null) {
      // remove the value
      resource.removePropVal(propertyURL);
      set(null);
      return;
    }
    set(newVal);
    setTouched(true);

    /**
     * Validates and sets a property / value combination. Will invoke the
     * callback if the value is not valid.
     */
    async function setAsync() {
      try {
        await resource.set(propertyURL, newVal, store, validate);
        handleValidationError && handleValidationError(null);
        // commit && (await resource.save(store));
        store.notify(resource);
      } catch (e) {
        handleValidationError ? handleValidationError(e) : console.log(e);
      }
    }
    await setAsync();
  }

  // If a value has already been set, return it.
  if (val !== null) {