use-form

In development

Install

Install with npm:

$ npm install --save use-form

Usage

import React from 'react';
import { render } from 'react-dom';
import { Form, Field } from 'use-form';

const UseFormExample = () => {
  const form = {
    initialValues: {
      'user.password': '[email protected]',
      user: {
        email: '[email protected]',
      },
      color: ['red'],
      remember: [true],
    },
    initialErrors: {
      'user.password': 'Initial error, from backend as example',
    },
    validate: values => ({
     user: {
       email: !values['user.email'] && 'email is required',
     },
     sections: !values.sections && 'sections is required',
     'user.password': !values.user?.password && 'password is required',
   }),
    onSubmit: values => {
      alert(JSON.stringify(values));
    },
  };

  return (
    <Form {...form}>
      {({ handleReset, handleSubmit, ...state }) => (
        <form
            ref={() => {
              form.current = { reset };
            }}
            onSubmit={handleSubmit}
          >
            <p>Use Form Example</p>
    
            <button type="button" onClick={() => setState(state + 1)}>
              setState {state}
            </button>
    
            <fieldset>
              <legend>Email:</legend>
              <Field
                type="text"
                name="user.email"
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <input {...input} {...props} />
                    <p className="error">{error}</p>
                  </>
                )}
                validate={value => {
                  if (value && value.length < 3) {
                    return 'Email length should be more 3 symbols';
                  }
                }}
                onFocus={event => {}}
                onBlur={event => {}}
                onChange={event => {}}
              />
            </fieldset>
            <fieldset>
              <legend>Password:</legend>
              <Field
                type="password"
                name="user.password"
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <input {...input} {...props} />
                    <p className="error">{error}</p>
                  </>
                )}
                validate={value => {
                  if (value && value.length < 3) {
                    return 'Password length should be more 3 symbols';
                  }
                }}
              />
            </fieldset>
            <fieldset>
              <legend>Color:</legend>
              <Field
                type="select"
                name="color"
                multiple
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <select {...input} {...props}>
                      <option value="red">Red</option>
                      <option value="blue">Blue</option>
                      <option value="green">Green</option>
                    </select>
                    <p className="error">{error}</p>
                  </>
                )}
                validate={value => {
                  if (value && value.length < 2) {
                    return 'You should select 2 options min';
                  }
                }}
              />
            </fieldset>
            <fieldset>
              <legend>Color 0:</legend>
              <Field
                type="text"
                name="color[0]"
                component={({ input, meta: { error } }) => (
                  <>
                    <p>{input.value}</p>
                    <p className="error">{error}</p>
                  </>
                )}
              />
            </fieldset>
            <fieldset>
              <legend>Sections:</legend>
              <Field
                type="select"
                name="sections"
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <select {...input} {...props}>
                      <option value="1">1</option>
                      <option value="2">2</option>
                      <option value="3">3</option>
                    </select>
                    <p className="error">{error}</p>
                  </>
                )}
              />
            </fieldset>
            <fieldset>
              <legend>Remember [0]:</legend>
              <Field
                type="checkbox"
                name="remember[0]"
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <label htmlFor="remember">
                      <input id="remember" {...input} {...props} />
                      Remember me?
                    </label>
                    <p className="error">{error}</p>
                  </>
                )}
                validate={value => {
                  if (!value) {
                    return 'Should be checked';
                  }
                }}
              />
            </fieldset>
    
            <fieldset>
              <legend>Remember [1]:</legend>
              <Field
                type="checkbox"
                name="remember[1]"
                component={({ input, meta: { error }, ...props }) => (
                  <>
                    <label htmlFor="remember1">
                      <input id="remember1" {...input} {...props} />
                      Remember me?
                    </label>
                    <p className="error">{error}</p>
                  </>
                )}
                validate={value => {
                  if (!value) {
                    return 'Should be checked';
                  }
                }}
              />
            </fieldset>
    
            <input type="reset" onClick={handleReset} />
            <input type="submit" />
          </form>
      )}
    </Form>
  );
};

render(<UseFormExample />, document.getElementById('app'));

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