`setState` in React portal containing a text input causes browser to scroll in Safari

If you place a text input inside a React portal overlay and the content adjacent to it scrolls, any event that changes state causes Safari to scroll to the portal (which is the bottom of the page).

To recreate

setState

setState

Only happens in Safari (currently using 11.1.2)

import * as React from 'react';
import createPortal from 'react-dom';

export default class App extends React.Component
const portalActive, randomBoolean = this.state;

togglePortal = () =>
this.setState((portalActive) =>
return portalActive: !portalActive;
);
;

toggleBoolean = () =>
this.setState((randomBoolean) =>
return randomBoolean: !randomBoolean;
);
;

render()
const textInput = ;
const portal = this.state.portalActive
? (textInput)
: null;

return (
<>
<button onClick=this.togglePortal
portal
Array.from(length: 40).map(() => (
<p>Content that causes scrolling</p>
))
</>
);


class Portal extends React.Component
const children, idPrefix = this.props;
componentWillMount()
const portalNode = document.createElement('div');
document.body.appendChild(portalNode);

componentWillUnmount()
document.body.removeChild(portalNode);

render()
return createPortal(children, portalNode);

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