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Trap tab in modals (#11493)

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ThibG 2019-08-06 11:59:28 +02:00 committed by Eugen Rochko
parent 68da55e50c
commit 21e3671e32
1 changed files with 23 additions and 0 deletions
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23
app/javascript/mastodon/components/modal_root.js
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@ -21,8 +21,30 @@ export default class ModalRoot extends React.PureComponent {
} }
} }
handleKeyDown = (e) => {
if (e.key === 'Tab') {
const focusable = Array.from(this.node.querySelectorAll('button:not([disabled]), [href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])')).filter((x) => window.getComputedStyle(x).display !== 'none');
const index = focusable.indexOf(e.target);
let element;
if (e.shiftKey) {
element = focusable[index - 1] || focusable[focusable.length - 1];
} else {
element = focusable[index + 1] || focusable[0];
}
if (element) {
element.focus();
e.stopPropagation();
e.preventDefault();
}
}
}
componentDidMount () { componentDidMount () {
window.addEventListener('keyup', this.handleKeyUp, false); window.addEventListener('keyup', this.handleKeyUp, false);
window.addEventListener('keydown', this.handleKeyDown, false);
} }
componentWillReceiveProps (nextProps) { componentWillReceiveProps (nextProps) {
@ -52,6 +74,7 @@ export default class ModalRoot extends React.PureComponent {
componentWillUnmount () { componentWillUnmount () {
window.removeEventListener('keyup', this.handleKeyUp); window.removeEventListener('keyup', this.handleKeyUp);
window.removeEventListener('keydown', this.handleKeyDown);
} }
getSiblings = () => { getSiblings = () => {