JSFiddle - React, Tailwind, and code Playground

HTML

<form name="form1">
    <fieldset name="Group1">
        <legend>Group box</legend>Center Title:
        <select name="ctrTitles" id="ctrTitles">
            <option value="1">Corp 1</option>
            <option value="2">Shamrock Gold</option>
            <option value="3">Hensin Way</option>
        </select>
        <br />
        <br />Address 1:
        <textarea name="TextArea1" id="TextArea1" cols="20" rows="2"></textarea>
        <br />
    </fieldset>
</form>

JavaScript

var centerLocations = {
    text1: 'some text1',
    text2: 'some text2',
    text3: 'some text3'
};

$('#ctrTitles').change(function () {
    $("#TextArea1").val(centerLocations["text" + this.value]);
}).change();