JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" value="1" />
<input type="checkbox" value="2" />
<input type="checkbox" value="3" />
<input type="checkbox" value="4" />
<input type="checkbox" value="5" />

JavaScript

$(document).ready(function() { 
    var str = '1,3,5';
    var temp = new Array();
    temp = str.split(",");
    for (i=0; i!=temp.length;i++) {
        var checkbox = $("input[type='checkbox'][value='"+temp[i]+"']");
        checkbox.attr("checked","checked");
    }
});