JSFiddle - React, Tailwind, and code Playground

HTML

<a id="addDToSearch" class="searchLetters" title="D" accesskey="D">D</a>
<a id="addEToSearch" class="searchLetters" title="E" accesskey="E">E</a>

JavaScript

$(function(){
	$('.searchLetters').on('click', function(){ addClickedLetter(this.title); });
});

function addClickedLetter(letter) {
	alert(letter);
}