JavaScript Blob Object Creation from HTTP Response Data

This code creates a new Blob object in JavaScript. The Blob constructor takes two arguments: an array of data and an options object.

In this case, the array of data is the response data from an HTTP request, which is passed in as the first argument. The second argument is an options object that specifies the MIME type of the data, which is extracted from the 'content-type' header of the response.

Overall, this code is typically used to create a Blob object from a response stream in order to manipulate or display the data in a browser environment.