Duplicated hash on build

Author: SamirPerezBazzaCreated Jun 12, 2026Updated Jul 13, 2026

Labelscssneeds reproduction

Describe the bug

Some styles have the same hash when building. I managed to fix this by adding a debugId using the vite plugin, but this should not happen

typescript

const threadStyles = {
threadContainer: style({
    border: `1px solid ${color.grey40}`,
    background: color.grey10,
    padding: `${spacing['1x']} ${spacing['2x']}`,
  }),
  threadCount: style({
    display: 'flex',
    justifyContent: 'space-between',
    alignItems: 'center',
    cursor: 'pointer',
    fontWeight: font.weightMedium,
  })
}

Reproduction

System Info

bash

System:
    OS: macOS 26.5
    CPU: (12) arm64 Apple M4 Pro
    Memory: 2.41 GB / 48.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.14.1 - /opt/homebrew/bin/node
    npm: 11.12.1 - /opt/homebrew/bin/npm
    pnpm: 10.22.0 - /opt/homebrew/bin/pnpm
  Browsers:
    Chrome: 149.0.7827.103
    Safari: 26.5
  npmPackages:
    @vanilla-extract/css: ^1.14.2 => 1.14.2 
    @vanilla-extract/vite-plugin: ^5.1.1 => 5.1.1 
    vite: ^8.0.3 => 8.0.3

Used Package Manager

pnpm

Logs

bash

Validations

Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
The provided reproduction is a minimal reproducible example of the bug.

Source: vanilla-extract-css/vanilla-extract

View original on GitHub View discussion on GitHub