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avoid mutating DOM unnecessarily in toggleDataset()

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tophf 2021-08-13 12:15:58 +03:00
parent 598735fc7b
commit 54427c498d
1 changed files with 3 additions and 2 deletions
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5
js/dom.js
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@ -337,10 +337,11 @@ async function showSpinner(parent) {
} }
function toggleDataset(el, prop, state) { function toggleDataset(el, prop, state) {
const wasEnabled = el.dataset[prop] != null; // avoids mutating DOM unnecessarily
if (state) { if (state) {
el.dataset[prop] = ''; if (!wasEnabled) el.dataset[prop] = '';
} else { } else {
delete el.dataset[prop]; if (wasEnabled) delete el.dataset[prop];
} }
} }