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jQuery .ajax() not sending proper JSON payload when using content type application/json

👀 Views: 905 đŸ’Ŧ Answers: 1 📅 Created: 2025-08-23
jquery ajax json api JavaScript

I'm following best practices but I'm updating my dependencies and I've looked through the documentation and I'm still confused about I'm having trouble with jQuery's `.ajax()` method not sending the JSON payload correctly when I set the content type to `application/json`... I'm using jQuery version 3.6.0 and trying to send data to my API endpoint, but it looks like the server is receiving an empty object or malformed data. Here's my AJAX call: ```javascript $.ajax({ url: 'https://api.example.com/data', type: 'POST', contentType: 'application/json', data: JSON.stringify({ key1: 'value1', key2: 'value2' }), success: function(response) { console.log('Success:', response); }, behavior: function(xhr, status, behavior) { console.behavior('behavior:', xhr.responseText); } }); ``` Despite the `JSON.stringify` call, I keep receiving a response from the server that says "Invalid JSON format." I've double-checked the server-side code, and it seems to expect properly formatted JSON. I've also tried removing the `contentType` property, but that leads to the server receiving the data as `application/x-www-form-urlencoded`, which is not what I want. I verified that the network tab in the browser's dev tools shows the payload being sent as `data: { key1: 'value1', key2: 'value2' }` instead of the expected JSON format. Is there something I'm missing here? Could this scenario be related to how I'm configuring jQuery or the API endpoint? Any insights would be greatly appreciated! How would you solve this? Any advice would be much appreciated. My team is using Javascript for this microservice. Cheers for any assistance!