Function getMutatorApi

src/FinalForm.ts:279–307

(key: string)

  // bind state to mutators
  const getMutatorApi = (key: string) => (...args: any[]) => {
    // istanbul ignore next
    if (mutators) {
      // ^^ causes branch coverage warning, but needed to appease the Flow gods
      const mutatableState: MutableState<FormValues, InitialFormValues> = {
        formState: state.formState,
        fields: state.fields,
        fieldSubscribers: state.fieldSubscribers,
        lastFormState: state.lastFormState,
      };
      const returnValue = mutators[key](args, mutatableState, {
        changeValue,
        getIn,
        renameField,
        resetFieldState: api.resetFieldState as (name: string) => void,
        setIn,
        shallowEqual,
      });
      state.formState = mutatableState.formState;
      state.fields = mutatableState.fields;
      state.fieldSubscribers = mutatableState.fieldSubscribers;
      state.lastFormState = mutatableState.lastFormState;
      runValidation(undefined, () => {
        notifyFieldListeners(undefined);
        notifyFormListeners();
      });
      return returnValue;
    }
  };

  const mutatorsApi = mutators
    ? Object.keys(mutators).reduce((result, key) => {