| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | var CAPS_REGEX = /[A-Z]/g;
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| 4 | function updateDataset(oldVnode, vnode) {
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| 5 | var elm = vnode.elm, oldDataset = oldVnode.data.dataset, dataset = vnode.data.dataset, key;
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| 6 | if (!oldDataset && !dataset)
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| 7 | return;
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| 8 | if (oldDataset === dataset)
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| 9 | return;
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| 10 | oldDataset = oldDataset || {};
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| 11 | dataset = dataset || {};
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| 12 | var d = elm.dataset;
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| 13 | for (key in oldDataset) {
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| 14 | if (!dataset[key]) {
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| 15 | if (d) {
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| 16 | if (key in d) {
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| 17 | delete d[key];
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| 18 | }
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| 19 | }
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| 20 | else {
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| 21 | elm.removeAttribute('data-' + key.replace(CAPS_REGEX, '-$&').toLowerCase());
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| 22 | }
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| 23 | }
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| 24 | }
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| 25 | for (key in dataset) {
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| 26 | if (oldDataset[key] !== dataset[key]) {
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| 27 | if (d) {
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| 28 | d[key] = dataset[key];
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| 29 | }
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| 30 | else {
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| 31 | elm.setAttribute('data-' + key.replace(CAPS_REGEX, '-$&').toLowerCase(), dataset[key]);
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| 32 | }
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| 33 | }
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| 34 | }
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| 35 | }
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| 36 | exports.datasetModule = { create: updateDataset, update: updateDataset };
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| 37 | exports.default = exports.datasetModule;
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| 38 | |
| \ | No newline at end of file |