Toastr undefined in angularjs

I had this problem and it turns out Toastr needs JQuery to work, always make sure you include JQuery before Toastr, for example in angular.json:

            "scripts": [
              "node_modules/jquery/dist/jquery.min.js", // Make sure this comes before
              "node_modules/toastr/build/toastr.min.js", // this one
              "node_modules/bootstrap/dist/js/bootstrap.min.js"
            ]

Looking at the toastr sources it looks like getOptions() calls jQuery's $.extend() method.

Toastr takes a dependency on jQuery, from the first line of the github readme:

toastr is a Javascript library for non-blocking notifications. jQuery is required. The goal is to create a simple core library that can be customized and extended.

Just include jquery in your master view html.

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>