How to Take Full-Page Screenshots of Single-Page Applications (React, Vue, Next.js)

How to Take Full-Page Screenshots of Single-Page Applications (React, Vue, Next.js) You're building a screenshot tool for your React dashboard. You take a screenshot of the page. The image shows... half the content. The bottom half is blank. You take another screenshot. This time it shows more content, but images are still loading. Third attempt. The layout shifts as lazy-loaded components mount. The screenshot is misaligned. Fourth attempt... you give up and just use manual Playwright. The Problem: SPAs Break Naive Screenshot Tools Single-Page Applications (React, Vue, Next.js) render differently than traditional server-rendered HTML. Traditional HTML: Request → Server renders full HTML → Response → Browser displays everything SPA: Request → Server sends skeleton → Browser receives HTML → JavaScript loads → Components mount → API calls fire → Data arrives → Components re-render → Lazy-loaded sections appear → Images load → Layout stabilizes Each screenshot tool breaks at a different p