Add Sweetalert to dashboard page

This NPM manipulate’s the DOM and therefore can’t be used directly in Velo. You can use this option if you use a Custom Element which is a reusable web component element that you define in a JavaScript file that is either hosted by Wix or hosted on a server that is external to Wix. The custom element is defined using the standard ECMAScript 2015 class syntax. See this simple Link example to get started with Custom Elements.