Job listings with filtering

I found I got myself in some unexpected problems. Ideally I wanted to have all the filter options on top of the page once selected, and removing the tab the filter would refresh. How would I do that? You can click on the tab and they all work accordingly.

Should I have approached this a different way? As this was practice there may be some ambiguous variables eg let x = .....! The only way I will get better is if someone could look at my code and advise me, what am I doing wrong? where should i approve? All advice would be appreciated.

Thanks