fix tabs_bar.js (#4436)
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@ -48,7 +48,9 @@ export default class TabsBar extends React.Component {
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const nextTab = tabs.find(tab => tab.contains(e.target));
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const { props: { to } } = links[Array(...this.node.childNodes).indexOf(nextTab)];
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currentTab.classList.remove('active');
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if (currentTab) {
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currentTab.classList.remove('active');
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}
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const listener = debounce(() => {
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nextTab.removeEventListener('transitionend', listener);
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