JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="my_ta_1">Example 1</textarea>
<textarea id="my_ta_2">Example 2</textarea>
<textarea id="my_ta_3">Example 3</textarea>

JavaScript

$('textarea[id^="my_ta_"]').filter(function() {
    return this.value.toLowerCase().indexOf('example 2') != -1;
}).prop('disabled', true);