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24 lines
527 B
JavaScript
24 lines
527 B
JavaScript
function updateDataset(oldVnode, vnode) {
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var elm = vnode.elm,
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oldDataset = oldVnode.data.dataset,
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dataset = vnode.data.dataset,
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key
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if (!oldDataset && !dataset) return;
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oldDataset = oldDataset || {};
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dataset = dataset || {};
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for (key in oldDataset) {
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if (!dataset[key]) {
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delete elm.dataset[key];
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}
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}
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for (key in dataset) {
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if (oldDataset[key] !== dataset[key]) {
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elm.dataset[key] = dataset[key];
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}
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}
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}
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module.exports = {create: updateDataset, update: updateDataset}
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