How to use JavaScript to locate specific HTML Elements inside your webpage.
Some useful references
NodeList - https://developer.mozilla.org/en-US/docs/Web/API/NodeList
querySelector - https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector
querySelectorAll - https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll
getElementById - https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById
textContent - https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent
