Reincorporate tophf's update
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@ -356,7 +356,14 @@ function createStyleElement({
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if (check) detectSloppyRegexps([style]);
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const oldElement = $(ENTRY_ID_PREFIX + style.id);
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if (oldElement) {
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if (oldElement && oldElement.contains(document.activeElement)) {
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// preserve the focused element inside
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const {className} = document.activeElement;
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oldElement.parentNode.replaceChild(entry, oldElement);
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// we're not using $() since className may contain multiple tokens
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const el = entry.getElementsByClassName(className)[0];
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if (el) el.focus();
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} else if (oldElement) {
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oldElement.parentNode.replaceChild(entry, oldElement);
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} else {
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container.appendChild(entry);
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