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How do you send form-encoded data with Fetch API?

Patricia Arquette
Patricia ArquetteOriginal
2024-11-13 02:56:02700browse

How do you send form-encoded data with Fetch API?

POSTing Form-Encoded Data Using Fetch

When making POST requests, you might need to include form-encoded data in your payload. Here's how to handle this using the Fetch API:

Solution

You can easily include form-encoded parameters in your request using the URLSearchParams object. Here's an example:

fetch('https://example.com/login', {
    method: 'POST',
    headers:{
      'Content-Type': 'application/x-www-form-urlencoded'
    },    
    body: new URLSearchParams({
        'userName': '[email protected]',
        'password': 'Password!',
        'grant_type': 'password'
    })
});

This will encode your parameters as 'userName=[email protected]', 'password=Password!', and 'grant_type=password', and append them to the request body.

For more information on the WindowOrWorkerGlobalScope.fetch method, refer to the Mozilla Developer Network documentation: https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch

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