disable div class

[JamesCrandall]

Should be something simple I'm missing but having difficulty setting the property an html element.  The sample below is not working as expected -- I can click the element and it seems to execute when it should be "disabled".

This is the widget.html:

<div class="workflow-step refine-application-boundaries" id="refine-button">
    <div class="jimu-btn workflow-step-title" data-dojo-attach-event="click:activateRefineApplicationBorderTool">2. Refine Boundaries</div>  
</div>‍‍‍

This is the widget.js

startup: function () {

    // called on startup.           
     document.getElementById("refine-button").disabled = true;
    ‍‍‍‍‍

[JamesCrandall]

Thanks for that, Robert!

[JamesCrandall]

Ken, I took this post and implemented similar check to see if a feature exists but have it in a function that can be called when that button is clicked and evaluates to simply not execute based upon the count.

Thanks!