JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<div style="width: 100px; overflow: hidden; white-space: nowrap;">
    <label id="getMyWidthLabel" class="lb">
        Some text which is longer than the div's 100 pixels.
    </label>
</div>

CSS

.lb {
    border: 1px solid red;
}

JavaScript

var a = $("#getMyWidthLabel").width();
alert(a);