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41 lines
1.1 KiB
41 lines
1.1 KiB
2 years ago
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const CAPS_REGEX = /[A-Z]/g;
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function updateDataset(oldVnode, vnode) {
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const elm = vnode.elm;
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let oldDataset = oldVnode.data.dataset;
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let dataset = vnode.data.dataset;
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let key;
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if (!oldDataset && !dataset)
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return;
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if (oldDataset === dataset)
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return;
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oldDataset = oldDataset || {};
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dataset = dataset || {};
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const d = elm.dataset;
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for (key in oldDataset) {
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if (!dataset[key]) {
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if (d) {
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if (key in d) {
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delete d[key];
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}
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}
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else {
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elm.removeAttribute("data-" + key.replace(CAPS_REGEX, "-$&").toLowerCase());
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}
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}
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}
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for (key in dataset) {
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if (oldDataset[key] !== dataset[key]) {
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if (d) {
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d[key] = dataset[key];
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}
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else {
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elm.setAttribute("data-" + key.replace(CAPS_REGEX, "-$&").toLowerCase(), dataset[key]);
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}
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}
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}
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}
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export const datasetModule = {
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create: updateDataset,
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update: updateDataset,
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};
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//# sourceMappingURL=dataset.js.map
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