fix: Input shrinks to its wrapper past the browser default of size=20#35764
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smhigley wants to merge 2 commits intomicrosoft:masterfrom
Open
fix: Input shrinks to its wrapper past the browser default of size=20#35764smhigley wants to merge 2 commits intomicrosoft:masterfrom
smhigley wants to merge 2 commits intomicrosoft:masterfrom
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dmytrokirpa
approved these changes
Feb 24, 2026
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Previous Behavior
This is a little complex since it deals with
<input>-specific browser styling around min-width. Input elements have a defaultsize="20"(the html attribute, not our Fluent one), which creates something like amin-widthstyle, but not actually a defaultmin-width, so it is not overridden by our CSS style ofmin-width: 0. The default behavior is to ensure at least 20 characters are shown, which is something like a minimum width of 150px (which can vary a little per OS, etc.).This creates a problem where the Fluent Input does not shrink to containers that are both:
One example is containers with
display: grid, which is incidentally the style our Field control uses. So the Input does not shrink with a Field when the Field goes below ~150ish pxHere's a stackblitz from a partner team showing the issue (either zoom, shrink the window, or both to see input grow past the container bounds): https://stackblitz.com/edit/yt5wtcjy?file=index.html
(there is also an ADO a11y issue related to reflow)
New Behavior
From both my memory and the CSS style of
min-width: 0, I believe our intention was to make our Fluent Input shrink to any container, no matter how small. I've addedsize="1"to the inner<input>, so it together with the existingmin-widthstyle should allow this for any container.Related Issue(s)