I want to implement loader widget in magento 2, In my form i have placed one button
<div style="display:inline; float:right; width:100%; margin-bottom:5px;">
<button style="" class="scalable go" type="submit" id="button1"><span>Do some action</span></button>
</div>
When i click this button i want to call url (frontName/Controller/Action). While this action performing i want to show loader widget.