redux-form-async-validator

redux-form-async-validator aims to provide an easy way to perform asynchronous validation on multiple redux-form fields.

Installation

npm: npm install redux-form-async-validator --save

yarn: yarn add redux-form-async-validator

Usage

See below for an example usage:

import { composeAsyncValidator } from 'redux-form-async-validator';

const asyncValidateUsername = /* Some validator */
const asyncValidateEmail = /* Some validator */

export default reduxForm({
  form: 'some-form',
  asyncValidate: composeAsyncValidator({
    username: [asyncValidateUsername, 'Username is not available'],
    email: [asyncValidateEmail, 'Email is not available']
  }),
  asyncChangeFields: ['email', 'username']
})(YourFormComponent);

API

composeAsyncValidator (validatorObj: object) -> (asyncValidator: function)

Parameters

validatorObj: object (required): An object in which each key corresponds to a field name and each value is an array containing an asynchronous validator function and the error message should the validation fail. All validator functions must return a Promise - a resolved promise to indicate successful validation or a rejected promise to indicate a failed validation.

Return

asyncValidator: function: The resulting validator function uses the provided validatorObj to ensure that the correct validator function runs whenever an async field changes. This resulting asyncValidator function will be invoked everytime any fields listed in the asyncChangeFields prop changes (See the redux-form docs for more info).