JSFiddle - React, Tailwind, and code Playground

HTML

<textarea  id="write" cols="50" rows="10"></textarea><br>
<textarea  id="write_short" cols="50" rows="10"></textarea>

JavaScript

var selected_field = "";

$('textarea').focus(function(){ 
    selected_field= "#"+this.id; 
    console.log(selected_field); 
});


$(selected_field).mouseout(function(){
   $(selected_field).css("background-color", '#ACFA58');
    
});