After a year of keeping CSS Grid to internal projects, we shipped our first fully Grid-based layout to a client this year — a media company's article grid, the same kind of irregular magazine-style layout we had been faking with flexbox and manual width calculations for longer than we would like to admit.
Grid's `grid-template-areas` made the responsive behavior far easier to reason about than our old approach. Instead of juggling flexbox `order` properties and manual width percentages across breakpoints, we just redefine the named grid areas in each media query, and the DOM order never has to change. A developer new to the project can look at the CSS and see, in something close to plain English, what the layout actually looks like at each breakpoint, which was never true of the equivalent flexbox-and-math approach it replaced.
The fallback strategy
For the handful of older browsers this client still needed to support, we shipped a simpler flexbox-based fallback layout behind a feature query (`@supports`), which most visitors never see since Grid support is now solid across current browsers. Building the fallback did cost real time — effectively building the same layout twice, once in Grid and once in flexbox — but the client's analytics showed the affected browser share was small enough by this point that a simplified, slightly less visually ambitious fallback layout was an acceptable tradeoff rather than something worth blocking the whole project on.
What surprised us in practice
The biggest surprise was not technical but organizational: once the design team saw how directly `grid-template-areas` maps onto an actual visual layout, they started sketching layout ideas in terms of named grid areas during design review, which shortened the back-and-forth between design and development noticeably compared to previous projects where a layout idea had to be translated into an implementation approach by the development team after the fact.
We expect Grid to be our default for any layout with real two-dimensional structure going forward, with flexbox reserved for the one-dimensional cases — a nav bar, a button row — where it is genuinely the simpler tool. The two are not competing approaches so much as tools for different shaped problems, and having both solidly available now, rather than reaching for flexbox everywhere purely because it was the mature option, has made our CSS across new projects noticeably more direct.
Bringing the design team into the CSS conversation
Part of what made this rollout smoother than our earlier internal-only Grid experiments was involving the design team directly in a short technical walkthrough of `grid-template-areas` before the project started, rather than treating layout implementation as a purely developmental concern happening after designs were already finalized. Designers sketching layouts with named regions in mind up front meant fewer awkward translation decisions during implementation, and fewer instances of a design that looked clean in a static comp but had no obvious clean mapping onto an actual CSS layout system.
A note on debugging tooling
Browser DevTools' support for visualizing Grid layouts had matured considerably compared to our earlier, more tentative experiments, with an overlay showing grid lines and named areas directly in the inspector. This alone meaningfully sped up development compared to the mental-math debugging we were used to with flexbox-based layouts, where reasoning about why an element ended up a particular size or position often meant temporarily adding visible borders or background colors just to understand what was happening, a habit this new tooling has mostly let us drop.