react-input-handler
v1.0.3
Published
Utility function to handle input changes in React.
Downloads
12
Readme
react-input-handler
⚡️ Utility function to handle input changes in React based on React's handling multiple input docs.
Features
- Package size is: 1.66KB (0.8KB gzipped!).
- Supports all
<input />
s,<textarea />
and<select />
elements. - Supports
<select multiple />
. - Supports checkboxes with same name via array notation.
- Play well with deep state traversal using lodash's set method.
- Multiple bundles: CJS, ESM and UMD.
Installation
yarn add react-input-handler
or
npm install react-input-handler --save
Usage
Two things needs to be done to use react-input-handler:
- Create a bound function (see 2nd line in constructor).
- Attach the bound function to
onChange
events.
Example
import React from 'react'
import ReactInputHandler from 'react-input-handler'
class Form extends React.Component {
constructor(props) {
super(props)
this.handleChange = ReactInputHandler.bind(this)
this.handleSubmit.bind(this)
}
render() {
return (
<form>
<label>Fullname:</label>
<input type="text" name="user.fullname" onChange={this.handleChange} />
<label>Biography:</label>
<textarea type="text" name="user.bio" onChange={this.inputHandler} />
<label> Are you a developer?</label>
<input type="checkbox" name="user.developer" value="yes" onChange={this.inputHandler} />
<button onClick={this.handleSubmit}>Submit</button>
</form>
)
}
handleSubmit(event) {
event.preventDefault()
console.log(this.state)
// Output: { user: { fullanme: "string", bio: "string", developer: true|false } }
}
}
Documentation
React-input-handler is a single function which accept two argument: an event and a optional callback function that will be passed to the setState
method.
The objective is simple: handle input changes and persist them into the component's state.
Array notation
By default, react-input-handler handles checkbox as boolean value. Sometimes, we may want two or more checkboxes to be handled as an array sharing the same name
attribute. To achieve this we have to suffix the name
attribute with []
. For example:
Before:
<input type="checkbox" name="one" value="1" onChange={this.inputHandler} checked />
<input type="checkbox" name="two" value="2" onChange={this.inputHandler} />
<input type="checkbox" name="three" value="3" onChange={this.inputHandler} checked />
// state: { one: true, two: false, three: true }
After:
<input type="checkbox" name="numbers[]" value="1" onChange={this.inputHandler} checked />
<input type="checkbox" name="numbers[]" value="2" onChange={this.inputHandler} />
<input type="checkbox" name="numbers[]" value="3" onChange={this.inputHandler} checked />
// state: { numbers: ["1", "3"] }
Development
- Clone and fork this repo.
- Install dependencies running:
yarn
ornpm install
. - Run tests.
- Prepare a pull request.
Test
yarn test
- to run all tests.yarn test -- --watch
to run all tests in watch mode.
Publish
- Bump version:
npm version x.x.x -m 'Version %s.'
. - Publish to NPM registry:
npm publish
. - Publish the new created tag:
git push origin --tags
.
Made with :heart: by Rubens Mariuzzo.