Should I Switch from getElementById to querySelector?

querySelector may be slightly slower, but its strength lies in the ability to select elements by classes, tags, or IDs, not just IDs. Plus, you can scope your selections to specific sections of your document, which can be beneficial in larger projects.

Honestly, if your current setup with getElementById is working perfectly, there's no real reason to switch. Yes, querySelector can offer more options, like targeting classes or multiple elements, but for a small app, performance differences are minimal. Only consider refactoring if it actually makes your code cleaner or easier to manage.

If you can get the element by ID, then stick with getElementById. But if you find yourself needing more flexibility in your selections, querySelector is the way to go since it uses CSS selector syntax and allows for more complex queries.