Demo clean up
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31
demo/src/js/tab-focus.js
Normal file
31
demo/src/js/tab-focus.js
Normal file
@ -0,0 +1,31 @@
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// Setup tab focus
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const container = document.getElementById('container');
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const tabClassName = 'tab-focus';
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// Remove class on blur
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document.addEventListener('focusout', event => {
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if (!event.target.classList || container.contains(event.target)) {
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return;
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}
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event.target.classList.remove(tabClassName);
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});
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// Add classname to tabbed elements
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document.addEventListener('keydown', event => {
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if (event.keyCode !== 9) {
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return;
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}
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// Delay the adding of classname until the focus has changed
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// This event fires before the focusin event
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setTimeout(() => {
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const focused = document.activeElement;
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if (!focused || !focused.classList || container.contains(focused)) {
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return;
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}
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focused.classList.add(tabClassName);
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}, 10);
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});
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