【avalon】parseData

<div data-a="true" data-b="false" data-d="5" data-e="null"></div>
<input type="text" value="true">
<script>
    var rbrace = /(?:\{[\s\S]*\}|\[[\s\S]*\])$/
    function parseData(data) {
        //console.log(data)
        try {
            if (typeof data === "object")
                return data
            data = data === "true" ? true :
                    data === "false" ? false :
                    data === "null" ? null :
                    +data + "" === data ? +data :
                    rbrace.test(data) ? JSON.parse(data) : data
        } catch (e) {
        }
        return data
    }

    var dataset = document.querySelector('div').dataset
    //console.log(parseData(dataset.a)) // "true" true
    //console.log(parseData(dataset.b)) // "false" false
    //console.log(parseData(dataset.c)) // undefined undefined
    //console.log(dataset.e, parseData(dataset.e)) // "null" null
    //console.log(parseData(dataset.d)) // "5" 5
</script>