Functions allow for code reuse and organization. Code that is commonly used throughout the program can be written inside a function, which can then be referenced whenever needed. Events provide a way for interactions on a website to trigger code execution in order to achieve the desired behavior. All of these concepts combined provide the underlying structure necessary for accessing the current domain.
The `href` property contains the full URL of the website, including any query strings or trailing slashes. The `hostname` property contains just the hostname of the domain without the protocol (i.e. www.example.com). The `port` property contains any optional port number specified in the URL (e.g. 80). Lastly, the `pathname` property contains just the path part of the URL (e.g. /get-current-domain).
When working with variables and operators, it is important to understand how data types are handled. Different operators will produce different results depending on what type of data they are operating on. Additionally, some operators may not work at all if it does not make sense for them to be used with certain data types, such as attempting to add two strings together instead of concatenating them.
Events and event listeners provide a way for websites to react differently when certain events occur on a page. They enable developers to detect user input, such as clicking buttons, hovering over certain elements, scrolling down the page, etc., so that code can be executed based on their actions.
Another gotcha worth mentioning is when attempting to access port numbers from URLs never assume that all requests will contain one. Finally, make sure that when match elements from an array you know what type of data you are expecting or you risk incorrect or unexpected results.
Tips for Debugging Get Current Domain Issues