Having trouble with your Javascript Ajax call?

I've been attempting to make a POST request using Ajax, but I keep encountering an error with status code 0. Strangely, all the request parameters seem to be functioning correctly in the Advanced REST Client.

Here's My Code Snippet:

<button>Post</button>

$('button').click(function(e) {
e.preventDefault();

$.ajax({
        url: "https://api.sendgrid.com/v3/mail/send",
        type: "POST",
        contentType: 'application/json',
        headers: {
            'Authorization' : 'Bearer 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',
            'Content-Type': 'application/json'
        },
        data: JSON.stringify({
              "personalizations": [{
                "to": [{
                  "email": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a2d6c7d1d6e2c7dac3cfd2cec78cc1cdcf">[email protected]</a>"
                }]
              }],
              "from": {
                "email": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7f1e1d1c1b3f18121e1613511c1012">[email protected]</a>"
              },
              "subject": "Great, World!",
              "content": [{
                "type": "text/plain",
                "value": "Cool OK!"
              }]
            }),
        dataType: "json",           
        success: function (response) {
            var resp = JSON.parse(response)
            alert(resp.status);
        },
        error: function (xhr, status) {
            alert("error : "+status+" :: "+JSON.stringify(xhr));
        }
    });
 });

Despite my best efforts, the code above continues to throw an error:

{"readyState":0,"responseText":"","status":0,"statusText":"error"}

You can also view this issue on jsfiddle

I'm in need of assistance to resolve this issue. If you have any suggestions or solutions, please help me out as I'm unable to identify the problem in the code.

Answer №1

Unlike the limitations of the browser itself, browser extensions have more flexibility with Cross Origin Requests. This means that extensions like Advance Rest Client or Postman can request Cross Origin Resources without restrictions. Check out this informative article from Chrome: https://developer.chrome.com/extensions/xhr

Therefore, when developing a website that needs to access resources from a different domain, CORS must be enabled, just like Matt mentioned.

Answer №2

It appears there could be a CORS issue causing the problem.

If you want to expand your knowledge on CORS, check out the following link:

There is no mention of ajax accessibility on this page, suggesting that a direct ajax request may not be feasible.

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