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The JavaScript location hostname property is used to get the hostname of the current URL. It does not take any arguments and returns a string value representing the hostname of the URL.

Here are some examples of how the hostname property can be used in JavaScript code:

1. To get the hostname of the current URL, you can use the following code:

// get the hostname of the current URL
const hostname = location.hostname;

2. To log the hostname of the current URL to the console, you can use the following code:

// log the hostname of the current URL to the console
console.log('Current URL hostname:', location.hostname);

3. To compare the hostname of the current URL with a certain value, you can use the following code:

// define the hostname to compare
const hostname = 'www.example.com';

// compare the hostname of the current URL with the specified value
if (location.hostname === hostname) {
  // do something...
}

Overall, the hostname property provides a convenient way to get the hostname of the current URL. It can be useful for tasks such as checking the current domain or server, or for other operations that require accessing the hostname of the URL.