make a http request with a custom body as binary and return a binary response in javascript

You can use the Fetch API in JavaScript to make an HTTP request with a custom binary body and receive a binary response.

Here is an example code snippet:

index.tsx
fetch(url, {
  method: 'POST',
  body: customBinaryData, // replace with your custom binary data
  headers: {
    'Content-Type': 'application/octet-stream' // set the Content-Type header to indicate binary data
  },
  responseType: 'arraybuffer' // set responseType to "arraybuffer" to receive binary data in the response
})
  .then(response => response.arrayBuffer()) // convert response to ArrayBuffer
  .then(binaryData => {
    // Handle binary response data
    console.log(binaryData);
  })
  .catch(error => {
    console.error(error);
  });
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In this example, the fetch function is called with the URL of the server endpoint that you want to send the binary data to. The body option is set to the custom binary data that you want to send, and the headers option is set to indicate that the body data is binary (application/octet-stream).

The responseType option is set to "arraybuffer" to indicate that you want to receive the response as a binary ArrayBuffer object.

The fetch function returns a Promise that resolves to the response object, which you can then read as binary data and handle as needed. The arrayBuffer method is called on the response object to convert it to an ArrayBuffer object.

Note that this example uses the modern fetch function, which is available in modern browsers and Node.js. If you need to support older browsers, you can use a polyfill or another HTTP client library.