React Form validation

Form validation solution for react JS, super easy to use and can handel all the major user cases.

Based on the React hooks and reactive programing.

No extra dependencies pure react js code & lightweight.

Features

1. Easy validations solution for react js pure react js no extra dependency.
2. Regex validations.
3. Custom validations.
4. Email validations.
5. Many useful form helping methods i.e hasError, hasChanges, isTouched, getValues, getErrors.
6. Easy to configure.
7. Nested form fields validations.
8. Dynamic add/remove fields.

Installation

npm install @surinderlohat/react-form-validation
or
yarn add @surinderlohat/react-form-validation

API Documentation

https://surinderlohat.github.io/react-form-validation/

Form Helping Methods

Note: all methods are available like: form.onSubmit()

Method	PARAMS	DESCRIPTION
resetToDefault	No	Reset form state to default All fields will be reset to the default state
getField	fieldKey i.e name or user.name if nested field	Return the specific field instance
getChangedFields	No	Return fields with initial value and changed value
clearForm	No	Clear form values and all nested child’s
onSubmit	No	Return from values and error state

Form Getters

| Name | RETURN Type | RETURN VALUE | | —— | —— |—— | | getValues | object | Return form values in same order we have pass | | getErrors | object | Display all errors for each nested field | | hasChanges | boolean | Return true if any field has changes |

Field Methods

| Method | TYPE | RETURN VALUE | | —— | —— | —— | | hasChanges | Getter | Return field state i.e it’s changed or not | | hasError | Getter | Return error state of the specific field | | isTouched | Getter | if field is touched or not | errorMessage| Getter| Return error message for current field from | | setValue | Function | Set value of specific field | | getValue | Function | Get value of specific field | | setRules | (newRules: Rules) | Update field rules on the fly | | setError | Function | Set custom error message on specific field | | showErrors | Function | Show error without touching the fields |

Rules

Rules 
    /* Used to identify which rule we are going to use for a field*/
    rule: 'min' | 'max' | 'required' | 'same' | 'email' | 'regex' | 'custom' | 'between' | 'range';
    /* Rule value used to provide value in rule i.e for min:2 max:10 rule value ruleValue will be ruleValue:2 or 5 
    ruleValue?: any;
    /* Used to provide custom message for each rule */
    message?: string;
    /* For special cases if we need custom validation then this method will help */
    validation?: (field: IField, form?: ReactForm) => string;

How to use

import { IFieldObject, useReactForm } from '@surinderlohat/react-form-validation';
import FormField from '../FormField/FormField';
import { Box, Typography, Button, Paper } from '@mui/material';
import { FC } from 'react';

// Fields Rules
const field: IFieldObject = {
  name: {
    label: 'User Name',
    placeholder: 'Enter your Name',
    rules: [{ rule: 'required' }],
  },
  email: {
    label: 'Email',
    placeholder: 'Enter your email',
    rules: [{ rule: 'email', message: 'Email is not valid' }],
  },
  password: {
    label: 'Password',
    rules: [{ rule: 'required', message: 'This field is required' }],
  },
  confirmPassword: {
    label: 'Confirm Password',
    rules: [{ rule: 'required' }, { rule: 'same', ruleValue: 'password', message: 'Should be same as Password' }],
  },
};

const BasicExample: FC = () => {
  const form = useReactForm(field);
  return (
    <Box sx=>
      <Paper sx=>
        <Typography variant="h5">Basic Signup Validations</Typography>
        {Object.keys(field).map(key => (
          <FormField key={key} field={form.getField(key)} />
        ))}
        <Button onClick={() => console.log(form.getValues())} disabled={form.hasError} variant="contained">
          Save Changes
        </Button>
        <Typography>Has Changes: {`${form.hasChanges}`}</Typography>
        <Typography>Has hasError: {`${form.hasError}`}</Typography>
        <Button onClick={() => form.showErrors()} variant="contained">
          Show Errors
        </Button>
      </Paper>
    </Box>
  );
};

export default BasicExample;

Live working Examples

https://codesandbox.io/examples/package/@surinderlohat/react-form-validation

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For more packages like this please checkout: https://github.com/surinderlohat

License

MIT Free Software!