page-check

Checks a web page mechanically before anyone looks at it — console errors, failed requests and broken images, horizontal overflow, text that is invisible or cut off, the contrast of every text block against the pixels really behind it, the weight of what loads, whether it moves at rest and whether it stops under prefers-reduced-motion — and leaves screenshots at several scroll depths and widths. Use after building or changing a landing page, prototype or any HTML page, before saying it works, when text sits over an image, a texture or anything that moves, when a page has animation, or when asked to verify, screenshot or measure a page, its legibility or its contrast. A video file is checked in video-editing; a single image in image-retouching.