JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" name="priv" value="1"/>
<input type="checkbox" name="priv" value="2"/>
<input type="checkbox" name="priv" value="3"/>
<input type="checkbox" name="priv" value="4"/>
<input type="checkbox" name="priv" value="5"/>
<input type="checkbox" name="priv" value="6"/>
<input type="checkbox" name="priv" value="7"/>
 <input type="checkbox" name="priv" value="8"/>

JavaScript

$(":checkbox").filter(function() {
  return this.value == '5';
}).prop("checked","true");

$("input[type=checkbox][value=6]").prop("checked",true);