toastr

toastr: non-blocking toasts. The library requires jQuery.

Warning

toastr and Bootstrap selectors can conflict on the same page.

CDN setup

Load jQuery first, then toastr:

<!-- jQuery -->
<script src="https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js" defer></script>

<!-- JavaScript -->
<script src="https://cdn.jsdelivr.net/npm/toastr@2/build/toastr.min.js" defer></script>

<!-- CSS -->
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/toastr@2/build/toastr.min.css">

Set FetchIt.Message:

document.addEventListener('DOMContentLoaded', () => {
  FetchIt.Message = {
    success(message) {
      toastr.success(message)
    },
    error(message) {
      toastr.error(message)
    },
  }
})

In a separate file with defer (after the FetchIt script), skip the DOMContentLoaded wrapper:

FetchIt.Message = {
  success(message) {
    toastr.success(message)
  },
  error(message) {
    toastr.error(message)
  },
}

Skip toastr if jQuery is not on the site: load it only when jQuery is already in use. Form blocks [data-success] and [data-validation-error] work alongside toasts. Skip Message if you only need those blocks. Selectors: documentation.