Screenshots or Live Pages for New Designer Portfolio

When building my portfolio do I include screenshots or live functioning pages of my work?

I am a new web designer with no professional experience, all of my work is generic website designs: e-commerce, hotel site, travel agency site, etc. I have designed and built the pages with html, css, and javascript, so I could show live sites or would images be sufficient?

Most portfolios I’ve seen are by pros who have screenshots and links to real sites.