ProgressBar: Fix inconsistent aria-valuenow rounding for decimal strings

[UnderHear]

Fix inconsistent aria-valuenow rounding between numeric and string decimal progress values.

Previously:

<ProgressBar progress={33.8} />   // aria-valuenow="34"
<ProgressBar progress="33.8" />   // aria-valuenow="33"

Both render a width of 33.8%, but expose different accessibility values because parseInt truncates the decimal part of string inputs before Math.round can round the value.

Replacing parseInt with parseFloat preserves the decimal part, allowing the existing Math.round to round both numeric and string inputs to the nearest integer consistently. Now, both 33.8 and "33.8" produce aria-valuenow="34", while the visual width remains 33.8%.

Changelog

New

• No new APIs.

Changed

• Use parseFloat instead of parseInt when parsing string progress values, preserving decimals for the existing rounding logic.
• Add regression tests covering numeric and string decimal progress values.

Removed

• None.

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

• All 20 ProgressBar tests passed using the Playwright provider with local Microsoft Edge.
• ESLint passed for both modified files.
• Regression tests verify that 33.8 and "33.8" both produce aria-valuenow="34" while preserving the 33.8% visual width.

[changeset-bot]

🦋 Changeset detected

Latest commit: 848a301

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[UnderHear]

Replacing parseInt with parseFloat preserves decimal precision before the existing Math.round, making numeric and string decimal inputs consistent. However, it also changes how some special strings are handled:

Input	Previous aria-valuenow	New aria-valuenow
"33.8"	33	34
"Infinity"	0	Infinity
"1e2"	1	100
"1e-2"	1	0
"1e309"	1	Infinity

[Copilot]

Copilot review overview

🟡 Changes recommended

The published behavior change is missing the required patch changeset.

Review effort: Balanced
Findings: 1

Open (1)

• Add changeset for the runtime rounding fix · New

What changed in this PR

Fixes ProgressBar accessibility values so numeric and string decimal inputs round consistently without changing visual width.

Changes:

• Replaces parseInt with parseFloat for string progress values.
• Adds regression tests covering decimal rounding and preserved width.

File	Description
packages/​react/​src/​ProgressBar/​ProgressBar.tsx	Preserves string decimals before rounding accessibility values.
packages/​react/​src/​ProgressBar/​ProgressBar.test.tsx	Checks both input types produce value 34 and width 33.8%.

[siddharthkp]

Very nice, thank you!

[UnderHear]

Hi, siddharthk! thk u approve my PR.
and I have a question, how to get Finishing Touch achievements?

i'm really like it

[siddharthkp]

FYI: I've enabled auto-merge, it will merge when main is unlocked.

and I have a question, how to get Finishing Touch achievements?

Sorry, that one is only available for staff for now!