Package

@carbon/react

Browser

No response

Package version

Storybook version

React version

No response

Description

Current Behavior

When incrementing decimal numbers by 1:

• 12.01 + 1 correctly becomes 13.01
• 15.01 + 1 incorrectly becomes 16.009999999999998

This is due to JavaScript's IEEE 754 floating-point precision limitations, where some decimal numbers cannot be precisely represented in binary.

Expected Behavior

All decimal numbers should maintain their precision when incrementing/decrementing, regardless of the base number:

• 12.01 + 1 → 13.01
• 15.01 + 1 → 16.01

The issue stems from floating-point precision in JavaScript. While users can work around this in their codebase, handling this at the library level would:

Provide consistent behavior across all implementations
Reduce maintenance burden for users
Ensure reliable decimal operations for financial/scientific applications

Reproduction/example

NA

Steps to reproduce

• Go to Number Input
• Enter "15.01"
• Click increment button once
• Value becomes "16.009999999999998" instead of "16.01"

Suggested Severity

Severity 4 = Unrelated to a user task, has a workaround or does not need a workaround.

Application/PAL

No response

Code of Conduct

• I agree to follow this project's Code of Conduct
• I checked the current issues for duplicate problems