The URL namespace provides 2 static methods for creating and revoking Blob URLs:

• URL.createObjectURL()
• URL.revokeObjectURL()

Given a blob, you generate a URL to it using the URL.createObjectURL() function:

const myURL = URL.createObjectURL(aBlob)

Once you have the blob URL, you can destroy it from memory using:

URL.revokeObjectURL(myURL)

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In addition to this, URL offers a very different functionality through its constructor, which can be used to create a URL. You can call it like this:

const currentUrl = new URL(window.location.href)

Now currentUrl has a set of properties you can use to inspect the URL:

• hash, the hash fragment
• host, the domain and port
• hostname, the domain
• href, the full URL
• origin, scheme, domain, and port
• password
• pathname
• port
• protocol
• search
• searchParams
• username

These are the usual parts of a URL.

You can alter any of these except origin and searchParams, which are read-only. and generate a new URL string by calling the toString() method, or by referencing the href property.

Lessons in this unit:

0:	Introduction
1:	▶︎ The URL object
2:	URLSearchParams
3:	Get the URL fragment
4:	Set the URL fragment
5:	The Navigator object