snabbdom/modules/dataset.js

A virtual DOM library with focus on simplicity, modularity, powerful features and performance.

"use strict";
function updateDataset(oldVnode, vnode) {
    var elm = vnode.elm, oldDataset = oldVnode.data.dataset, dataset = vnode.data.dataset, key;
    if (!oldDataset && !dataset)
        return;
    if (oldDataset === dataset)
        return;
    oldDataset = oldDataset || {};
    dataset = dataset || {};
    for (key in oldDataset) {
        if (!dataset[key]) {
            delete elm.dataset[key];
        }
    }
    for (key in dataset) {
        if (oldDataset[key] !== dataset[key]) {
            elm.dataset[key] = dataset[key];
        }
    }
}
exports.datasetModule = { create: updateDataset, update: updateDataset };
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = exports.datasetModule;
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