JSFiddle - React, Tailwind, and code Playground
HTML
<div id="div_testid">click me</div>
<textarea id="ta_testid" value="this is a teaxtarea"></textarea>
CSS
#ta_testid {
display:none;
}
JavaScript
var id = 'testid';
$('#div_'+id).click(function(){
$('#ta_'+id).css({display:'block'});
})