title: Send Firebase push notification from JavaScript/jQuery
body: <p>I am trying to send Firebase push notification from my html page to Android app. I am refering <a href="https://stackoverflow.com/a/37845174/4291272">this</a> SO answer to implement it. Here is my code:</p>
  
  <pre><code>function post() {
          $.ajax({
              type : 'POST',
              url : "https://fcm.googleapis.com/fcm/send",
              headers : {
                  Authorization : 'key=' + 'xxxxxxxxxxxx-xxx-xxxxxxxxxxxxxx'
              },
              contentType : 'application/json',
              data : {
                "to": "/topics/videos",
                "data": {
                  "message": "This is push for video!"
                 }
              },
              success : function(response) {
                  console.log(response);
              },
              error : function(xhr, status, error) {
                  console.log(xhr.error);                   
              }
          }); 
  </code></pre>
  
  <p>Currently, I am facing issue that in response of <code>POST request</code> I am getting following error:</p>
  
  <p><strong>JSON_PARSING_ERROR: Unexpected character (t) at position 0.</strong></p>