August 4, 2026
Centered? Not in this browser
We finally learned to center a div, then browsers added sidebars
The internet solved centering boxes, then sidebars turned it into chaos again
TLDR: A developer found that browser sidebars can make a webpage look off-center and built a workaround that uses pointer position to fix it. The comments quickly turned into a mini-drama, with some joking that centering is cursed forever and others arguing the whole idea feels deeply wrong.
Just when web creators thought they had finally beaten one of the internet’s oldest tiny annoyances—getting a page box to sit neatly in the middle—browsers invented a fresh new way to make it look weird. The author explains that centering content is now usually easy, until a browser sidebar or a tool panel opens and suddenly the page is technically centered, but only inside the visible webpage area, not the whole browser window. So began a surprisingly elaborate quest involving window measurements, a failed first fix, and an eventual workaround using the mouse pointer to figure out where the page really sits on screen.
But the real fireworks were in the comments, where the community instantly split into Team “this is clever” and Team “why would anyone want this?” One deadpan joker summed up decades of web pain with: centering a div? “Impossible.” Another confessed to the old spell many people still mutter—margin: 0 auto—like a lucky charm passed down through generations. Then came the backlash: one commenter flatly said they would never expect a site to center itself against the whole browser window, calling it wrong both visually and emotionally. Ouch.
And because no internet debate is complete without a drive-by complaint, someone else ignored the centering drama entirely to announce that the site had apparently broken mouse scrolling. Classic comments section behavior. In the end, this wasn’t just a story about layout tweaks—it was a full-blown reminder that on the web, even the smallest design detail can trigger philosophy, nostalgia, and mild outrage.
Key Points
- •The article examines how content can appear centered in the viewport while still being visually off-center relative to the full browser window when sidebars are present.
- •An initial JavaScript fix based on the difference between webview width and browser window width worked only when browser UI was on one side.
- •That approach failed with right-docked DevTools because the total width difference did not reveal how browser UI space was split between left and right.
- •The final solution uses trusted pointer event coordinates to calculate the webview’s position within the browser window and determine the required horizontal shift.
- •The author says Firefox exposes viewport position directly, while Chromium does not, and describes a tool called center, actually that applies the technique to other pages.