JSFiddle - React, Tailwind, and code Playground

HTML

<select id="activity_2" name="activity_2">
        
</select>

JavaScript

var optionString = '';
var data = ['John', 'Josh'];

data.forEach(function(dataItem, index){
	optionString += '<option value="' + index + '">' + dataItem + '</option>';
});

$('#activity_2').append(optionString);