Which tools or libraries are best for adding VR to websites (WebXR, A-Frame, Three.js, etc.)?

I’m looking into adding VR to my website and I’ve heard about tools like WebXR, A-Frame, and Three.js, but I’m not sure which one is the right one to choose. I want something that’s relatively easy to use, works on desktop and mobile, and allows users to interact with 3D elements in VR.

I’d love know what worked well, what was tricky, and if there are other libraries or frameworks I should consider. Any help would be useful