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How to Add Custom HTTP Headers to Ajax Requests in JavaScript and jQuery?
How to Add Custom HTTP Headers to Ajax Requests in JavaScript and jQuery?
Nov 24, 2024 am 06:09 AM
Exploring Custom HTTP Headers in JavaScript and jQuery Requests
Question:
How can you create or add custom HTTP headers to Ajax requests using JavaScript or jQuery?
Answer:
JavaScript and jQuery offer a range of options to add custom headers to Ajax requests. Here are various approaches:
- Individual Request Headers: To add headers to a specific request, use the headers property:
$.ajax({
url: 'foo/bar',
headers: { 'x-my-custom-header': 'some value' }
});
- Default Headers for All Requests: To set default headers for every request, use $.ajaxSetup():
$.ajaxSetup({
headers: { 'x-my-custom-header': 'some value' }
});
// Sends your custom header
$.ajax({ url: 'foo/bar' });
- beforeSend Hook for Custom Headers: This method allows you to add headers before each request:
$.ajaxSetup({
beforeSend: function(xhr) {
xhr.setRequestHeader('x-my-custom-header', 'some value');
}
});
// Sends your custom header
$.ajax({ url: 'foo/bar' });
Additional Considerations:
- With ajaxSetup(), you can define only one set of default headers.
- beforeSend can be used to set multiple headers and have custom logic before sending the request.
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