v7.1.0

• Add first-class TypeScript types to the project. They'll be maintained in the repo from now on. #139
• Improve matching performance by ~22%. #150

v7.0.0

• Potentially breaking: improve handling of semitransparent pixels. Previously, they were blended with white, so a transparent pixel vs white pixel would show zero difference; now pixels are blended with an irregular pattern, making it easier to catch regressions. (h/t @NathanMOlson #142)
• Improve match performance by ~6%. #147
• Significantly improve diff generation performance. (h/t @kawanet #105)
• Fix options handling to use the default value when undefined is passed explicitly. (h/t @denis-sokolov #146)
• Fix ESLint failing on Windows when working on the library locally. (h/t @haraldreingruber-dedalus #123)

v6.0.0

⚠️ Breaking: publish pixelmatch as a ES module. Use the older v5.3.0 if you need to support CommonJS environments.

v5.3.0

Upgrade pngjs dependency (used in the pixelmatch CLI) from v4 to v6.

v5.2.0

• Added a diffColorAlt option for coloring pixels that got darker differently (for differentiating between "added" and "removed" parts). #87 (h/t @tristen)
• Dropped Node v4/v6 support in the binary.

v5.1.0

Added diffMask option. #73 (h/t @tmeasday)

v5.0.2

• Fix input validation failing in some Jest environments. #62

v5.0.1

• 🐞 Fix alpha option being ignored in case of identical images.
• Slightly more robust input validation.

v5.0.0

• ⚠️ Breaking: update to ES6 syntax, dropping Node <6.4 and IE11 support.
• 🎨 Added configurable diff output (options alpha, aaColor, diffColor) (@dreignier @VP-)
• ⚡️ Improve matching performance by ~35%.
• ⚡️ Bypass detailed comparison when image data is identical, significantly improving performance when running tests on CI #60 (thanks to @bontscho).
• Fix anti-aliasing detection on image edges #51 (@IvanSanchez).
• Produce a meaningful error when image data is in the wrong format #53 (thanks to @LearningNerd)
• CLI: return non-zero exit code when images differ #54 (@maio).
• CLI: make diff output optional.
• Make the published NPM module smaller.

v4.0.2

Fixed the command-line to properly handle the case when threshold is not provided.