JSFiddle - React, Tailwind, and code Playground
by TheFiddler
HTML
<select id="fillme">
</select>
JavaScript
var categoryJson = {"Table":[{ "categoryid":"0","categoryname": "--Select Category1--"},{"categoryid":"2","categoryname":"subname2"},{"categoryid":"3","categoryname":"subname3"},{"categoryid":"4","categoryname":"subname4"}]};
var table = categoryJson.Table;
$(table).each(function(key,cat){
var option = '<option value="'+cat.categoryid+'">'+cat.categoryname+'</option>';
$('#fillme').append(option);
});