modify style attribute value vuejs code example

Example 1: css set property with data attribute

div::after {
  content: attr(data-whatever);
}

Example 2: jquery set data attribute value

//<div id="myElementID" data-myvalue="37"></div>
var a = $('#myElementID').data('myvalue'); //get myvalue
$('#myElementID').data('myvalue',38); //set myvalue