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| // Dependencies.
import React from 'react'
import PropTypes from 'prop-types'
// Utility methods.
import {
bind,
exists,
trim,
unique
} from '@t7/utils'
// Define class.
class Checkbox extends React.Component {
constructor (props) {
// Pass `props` into scope.
super(props)
// Bind context.
bind(this)
// Get default state.
this.defaultState()
}
// Set default state.
defaultState () {
// Props.
const {
checked,
id = unique()
} = this.props
this.state = {
id,
checked: !!checked,
oldChecked: checked
}
}
// Update state.
static getDerivedStateFromProps (props = {}, state = {}) {
// Props.
const { checked } = props
// State.
const { oldChecked } = state
// Set in conditional.
let newState = null
// Update?
if (
exists(checked) &&
checked !== oldChecked
) {
newState = {
checked,
oldChecked: checked
}
}
// Expose object.
return newState
}
// Change event.
handleChange (e = {}) {
// Get element.
const {
currentTarget: el = {}
} = e
// Get value.
const {
checked,
value = ''
} = el
this.setState({
checked: !!checked
})
// Callback.
this.props.handleChange(e, value, checked)
}
// Render method.
render () {
// State.
const {
checked,
id
} = this.state
// Props
const {
autofocus,
classNameForInput,
classNameForLabel,
disabled,
label,
name,
required,
type,
value,
styleForInput,
styleForLabel
} = this.props
// Events.
const { handleChange } = this
// Is radio?
const isRadio = (
type === 'radio'
)
// Props for label.
const propsForLabel = {
htmlFor: id,
style: styleForLabel,
// Build class name.
className: trim(
[
isRadio
? 't7-radio__label'
: 't7-checkbox__label',
classNameForLabel
].join(' ')
)
}
// Props for span.
const propsForSpan = {
'aria-hidden': true,
style: styleForInput,
// Build class name.
className: trim(
[
isRadio
? 't7-radio__fake'
: 't7-checkbox__fake',
classNameForInput
].join(' ')
)
}
// Props for input.
const propsForInput = {
disabled,
id,
name,
required,
type,
value,
autoFocus: autofocus,
onChange: handleChange,
onFocus: handleChange,
// Build class name.
className: (
isRadio
? 't7-radio'
: 't7-checkbox'
)
}
// Radio?
if (type === 'radio') {
propsForInput.defaultChecked = checked
// Checkbox?
} else {
propsForInput.checked = checked
}
// Expose UI.
return (
<label {...propsForLabel}>
<input
{...propsForInput}
/>
<span
{...propsForSpan}
/>
{label}
</label>
)
}
}
// Validation.
Checkbox.propTypes = {
autofocus: PropTypes.bool,
classNameForInput: PropTypes.string,
classNameForLabel: PropTypes.string,
disabled: PropTypes.bool,
id: PropTypes.string,
label: PropTypes.string,
name: PropTypes.string,
required: PropTypes.bool,
type: PropTypes.string,
styleForInput: PropTypes.object,
styleForLabel: PropTypes.object,
// Alphanumeric.
value: PropTypes.oneOfType([
PropTypes.string,
PropTypes.number
]),
// Control checked state.
checked: PropTypes.bool,
// Events.
handleChange: PropTypes.func
}
// Prop defaults.
Checkbox.defaultProps = {
type: 'checkbox',
// Events.
handleChange: () => {}
}
// Export.
export default Checkbox
|