__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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For_More_Tools:
import {
useEffect,
useLayoutEffect,
useRef,
useState,
} from '@wordpress/element';
import { AnimatePresence, motion } from 'framer-motion';
export const DynamicTextarea = ({
value,
className,
onChange,
onKeyDown,
disabled,
placeholder,
}) => {
const ref = useRef(null);
const [height, setHeight] = useState('auto');
// Dynamically resize the input by creating a temporary version and measuring the height.
// This is a workaround for scrollHeight not reducing when text is deleted.
useLayoutEffect(() => {
const tempTextarea = document.createElement('textarea');
tempTextarea.value = value || placeholder;
tempTextarea.rows = 1; // Start at 1
const styleProps = [
'paddingTop',
'paddingBottom',
'paddingLeft',
'paddingRight',
'width',
'fontFamily',
'fontSize',
'borderWidth',
];
const styles = window.getComputedStyle(ref.current);
// apply styles to the temporary textarea
styleProps.forEach((prop) => {
tempTextarea.style[prop] = styles[prop];
});
Object.assign(tempTextarea.style, {
position: 'absolute',
left: '-9999px',
});
document.body.appendChild(tempTextarea);
setHeight(`${tempTextarea.scrollHeight}px`);
document.body.removeChild(tempTextarea);
}, [value, placeholder]);
// Focus the input.
useEffect(() => {
const input = ref.current;
if (!input) return;
if (document.activeElement === input) return;
const inputLength = input.value.length;
input.focus();
input.setSelectionRange(inputLength, inputLength); // Place cursor at the end of the input.
}, [value]);
return (
<AnimatePresence>
<motion.div
className="m-0.5 w-full"
key="input"
animate={{ height }}
transition={{ duration: 0.2 }}
style={{ lineHeight: 0 }}
>
<label htmlFor="draft-ai-textarea" className="sr-only">
{placeholder}
</label>
<textarea
ref={ref}
id="draft-ai-textarea"
disabled={disabled}
className={className}
value={value}
rows={1}
onChange={onChange}
onKeyDown={onKeyDown}
onScroll={(event) => {
event.target.scrollTop = 0;
}}
placeholder={placeholder}
/>
</motion.div>
</AnimatePresence>
);
};