【avalon】data

if (root.dataset) {
    avalon.fn.data = function (name, val) {
        name = name && camelize(name)
        var dataset = this[0].dataset
        switch (arguments.length) {
            case 2:
                dataset[name] = val
                return this
            case 1:
                val = dataset[name]
                return parseData(val)
            case 0:
                var ret = createMap()
                for (name in dataset) {
                    ret[name] = parseData(dataset[name])
                }
                return ret
        }
    }
}