Responsive

Responsive design is no longer a topic reserved for consumer sites: business applications are now consulted on tablets in meetings, on the move at customer sites, or on external screens with unusual aspect ratios. A visual regression on an intermediate breakpoint — typically 820px on iPad or 1024px on a small laptop — can render part of your application unusable without anyone noticing locally, because developers usually work on a single screen size. The classic scenario: a breakpoint moved from 768px to 480px that crushes columns on tablet, a hamburger menu replaced by a desktop menu that overflows the screen, or a mobile font-size that applies all the way to 1024px and makes every text look too small on a portable display. Container queries add a new dimension of complexity, because they depend on the parent context rather than the global viewport, which makes regressions even less predictable. On certain browsers, a missing container-type on a parent is enough to break the rendering of an entire component. Delta-QA handles these cases by capturing every page at multiple viewport sizes defined by the team, building a multi-format visual baseline. On every run, the diff highlights columns that stack badly, elements that overflow, text that shrinks, components that misalign, and horizontal scrollbars that appeared. This lets QA teams cover all breakpoints without manually resizing a browser on every screen at every release, and ensures rendering consistency across all devices used by visitors and operators.