React textarea component that scrolls to the bottom whenever its content changes

AutoScrollingTextarea.tsx

/*
Copyright 2017 Peter Holak

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import * as React from 'react'

type TextareaProps = React.TextareaHTMLAttributes<HTMLTextAreaElement>
class AutoScrollingTextarea extends React.Component<TextareaProps & { autoScroll?: boolean }, {}> {

    element: HTMLTextAreaElement|null

    componentDidMount() {
        if (this.element && this.props.autoScroll !== false) {
            this.element.scrollTop = this.element.scrollHeight
        }
    }

    componentDidUpdate(prevProps: TextareaProps, prevState: {}) {
        if (prevProps.value !== this.props.value && this.element && this.props.autoScroll !== false) {
            this.element.scrollTop = this.element.scrollHeight
        }
    }

    render() {
        return <textarea {...this.props} ref={e => this.element = e} />
    }
  
}
  
export default AutoScrollingTextarea

@peterholak looks like a neat, working solution that I may be able to reuse. However, this code is not licensed, so not open source. Would you mind adding a copyright header to your gist linking to a preferably permissive license like ASL2 or MIT? Thanks!

@fbricon Sure, added MIT license header

@peterholak thank you very much!