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import { forwardRef, useEffect, useRef } from 'react'
import cn from 'classnames'
type AutoHeightTextareaProps =
& React.DetailedHTMLProps<React.TextareaHTMLAttributes<HTMLTextAreaElement>, HTMLTextAreaElement>
& { outerClassName?: string }
const AutoHeightTextarea = forwardRef<HTMLTextAreaElement, AutoHeightTextareaProps>(
(
{
outerClassName,
value,
className,
placeholder,
autoFocus,
disabled,
...rest
},
outRef,
) => {
const innerRef = useRef<HTMLTextAreaElement>(null)
const ref = outRef || innerRef
useEffect(() => {
if (autoFocus && !disabled && value) {
if (typeof ref !== 'function') {
ref.current?.setSelectionRange(`${value}`.length, `${value}`.length)
ref.current?.focus()
}
}
}, [autoFocus, disabled, ref])
return (
<div className={outerClassName}>
<div className='relative'>
<div className={cn(className, 'invisible whitespace-pre-wrap break-all')}>
{!value ? placeholder : `${value}`.replace(/\n$/, '\n ')}
</div>
<textarea
ref={ref}
placeholder={placeholder}
className={cn(className, 'disabled:bg-transparent absolute inset-0 outline-none border-none appearance-none resize-none')}
value={value}
disabled={disabled}
{...rest}
/>
</div>
</div>
)
},
)
export default AutoHeightTextarea
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