Failed to load resource: the server responded with a status of 419 () ajax code example

Example: HTTP call status: 419

Use this in the head section:

<meta name="csrf-token" content="{{ csrf_token() }}">

and get the csrf token in ajax:
$.ajaxSetup({
  headers: {
    'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
  }
});