Examples
<e-time datetime="2018-03-22T14:39:15.087"></e-time>format="ymdhis"
<e-time datetime="2018-03-22T14:39:15.087" format="ymdhis"></e-time>format="date"
<e-time datetime="2018-03-22T14:39:15.087" format="date"></e-time>type="daterange"
<e-time value='{ "start": "2019-12-04", "end": "2019-12-20" }' type="daterange" format="ymd">