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To make an HTTP request in JavaScript, you can use the built-in XMLHttpRequest object or the newer fetch() function. Here's an example using fetch():

In this example, we're making a GET request to the URL https://example.com/data, then converting the response to JSON and logging it to the console. If an error occurs, we catch it and log it to the console as well.

The fetch() function returns a Promise that resolves to the response from the server. You can chain multiple then() functions to process the response data in different ways, depending on the content type and format.

You can also use the XMLHttpRequest object to make HTTP requests. Here's an example using XMLHttpRequest:

In this example, we're creating a new XMLHttpRequest object, setting the HTTP method and URL, and defining event handlers for the load and error events. When the response is received, we log the response to the console. If an error occurs, we log the status text to the console.

Both fetch() and XMLHttpRequest can be used to make different types of HTTP requests, such as GET, POST, PUT, DELETE, etc. They also support adding headers and query parameters to the request.