37 lines
833 B
JavaScript
37 lines
833 B
JavaScript
import React, { Component } from 'react';
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import PropTypes from 'prop-types';
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class ExpandingTextarea extends Component {
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constructor (props) {
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super(props);
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this._handleChange = this._handleChange.bind(this);
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}
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componentDidMount () {
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this.adjustTextarea({});
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}
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_handleChange (event) {
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const { onChange } = this.props;
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if (onChange) onChange(event);
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this.adjustTextarea(event);
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}
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adjustTextarea ({ target = this.el }) {
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target.style.height = 0;
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target.style.height = `${target.scrollHeight}px`;
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}
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render () {
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const { ...rest } = this.props;
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return (
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<textarea
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{...rest}
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ref={x => this.el = x}
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onChange={this._handleChange}
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/>
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);
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}
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}
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ExpandingTextarea.propTypes = {
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onChange: PropTypes.func,
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};
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export default ExpandingTextarea;
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