react-form-input

An enhanced input component comes with validators and transformers.

Installation

$ npm install react-form-input --save

Example

import Input, {validators, transformers} from 'react-form-input';
 
class Form extends React.Component {
  constructor(props, context){
    super(props, context);
 
    this.state = {
      name: ''
    };
  }
 
  render(){
    return (
      <form>
        <Input
          value={this.state.name}
          validators={[
            validators.required('Please enter your name')
          ]}
          transformers={[
            transformers.trim
          ]}>
      </form>
    );
  }
}

API

Input

Props:

• validators: An array contains validator functions
• transformers: An array contains transformer functions
• onChange: Fired when the value changed
• defaultValue: The initial value of input
• value: The value of input
• type: The type of input (text, email, number, textarea, etc.)
• dirtyClass: The class name appended to the input when the value has been changed
• pristineClass: The class name appended to the input when the value has not been changed
• validClass: The class name appended to the input when the value is valid
• invalidClass: The class name appended to the input when the value is invalid

getValue()

Returns the value of the input.

getError()

Returns the error of the input.

setValue()

Sets the value of the input.

setError()

Sets the error of the input.

reset()

Reset the state of the input.

isDirty()

Returns true if the value has been changed.

isPristine()

Returns true if the value has not been changed.

Validators

required([message])

Checks whether the value is empty.

equals(str, [message])

Checks whether the value equal to a string.

startsWith(str, [message])

Checks whether the value starts with a string.

endsWith(str, [message])

Checks whether the value ends with a string.

match(regex, [message])

Checks whether the value matches a regular expression.

length(min, max, [message])

Checks the length of the value.

minLength(min, [message])

Checks the minimum length of the value.

maxLength(max, [message])

Checks the maximum length of the value.

email([message])

Checks whether the value is a valid email.

url([message])

Checks whether the value is a valid URL.

Transformers

trim

Trims the string.

toNumber

Transforms the value to a number.

toLowerCase

Transforms the value to lower case.

toUpperCase

Transforms the value to upper case.

FAQ

How to customize a validator?

A validator is a function that returns a error message when the value is invalid. For example:

function tweetValidator(value){
  return value.length <= 140;
}

How to customize a transformer?

A transformer is a function that takes the value and returns a new transformed value, just like a reducer. For example:

function lowerCaseTransformer(value){
  return value.toLowerCase();
}

License

MIT