csstools · romainmenke · May 13, 2026 · May 13, 2026 · May 13, 2026 · May 13, 2026
diff --git a/.github/ISSUE_TEMPLATE/css-issue.yml b/.github/ISSUE_TEMPLATE/css-issue.yml
@@ -79,6 +79,7 @@ body:
         - PostCSS Color Mix Function
         - PostCSS Color Mix Variadic Function Arguments
         - PostCSS Conditional Values
+        - PostCSS Container Rule Prelude List
         - PostCSS Content Alt Text
         - PostCSS Contrast Color Functions
         - PostCSS Custom Media Queries
@@ -100,6 +101,7 @@ body:
         - PostCSS Gradients Interpolation Method
         - PostCSS HWB Function
         - PostCSS IC Unit
+        - PostCSS Image Function
         - PostCSS Image Set Function
         - PostCSS Initial
         - PostCSS Is Pseudo Class

diff --git a/.github/ISSUE_TEMPLATE/plugin-issue.yml b/.github/ISSUE_TEMPLATE/plugin-issue.yml
@@ -76,6 +76,7 @@ body:
         - PostCSS Color Mix Function
         - PostCSS Color Mix Variadic Function Arguments
         - PostCSS Conditional Values
+        - PostCSS Container Rule Prelude List
         - PostCSS Content Alt Text
         - PostCSS Contrast Color Functions
         - PostCSS Custom Media Queries
@@ -97,6 +98,7 @@ body:
         - PostCSS Gradients Interpolation Method
         - PostCSS HWB Function
         - PostCSS IC Unit
+        - PostCSS Image Function
         - PostCSS Image Set Function
         - PostCSS Initial
         - PostCSS Is Pseudo Class

diff --git a/.github/labeler.yml b/.github/labeler.yml
@@ -143,6 +143,12 @@
       - plugins/postcss-conditional-values/**
       - experimental/postcss-conditional-values/**
 
+"plugins/postcss-container-rule-prelude-list":
+  - changed-files:
+    - any-glob-to-any-file:
+      - plugins/postcss-container-rule-prelude-list/**
+      - experimental/postcss-container-rule-prelude-list/**
+
 "plugins/postcss-content-alt-text":
   - changed-files:
     - any-glob-to-any-file:
@@ -275,6 +281,12 @@
       - plugins/postcss-ic-unit/**
       - experimental/postcss-ic-unit/**
 
+"plugins/postcss-image-function":
+  - changed-files:
+    - any-glob-to-any-file:
+      - plugins/postcss-image-function/**
+      - experimental/postcss-image-function/**
+
 "plugins/postcss-image-set-function":
   - changed-files:
     - any-glob-to-any-file:

diff --git a/.github/workflows/deploy-preset-env.yml b/.github/workflows/deploy-preset-env.yml
@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e
         with:
-          node-version: 24
+          node-version: 26
 
       - name: npm ci
         run: |

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e
         with:
-          node-version: 24
+          node-version: 26
 
       - name: npm ci
         run: |

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -23,7 +23,7 @@ jobs:
       # Enable annotations only for node 24 + ubuntu
       matrix:
         os: [ubuntu-latest]
-        node: [20, 22, 24, 25]
+        node: [20, 22, 24, 25, 26]
         include:
         - os: macos-latest
           node: 24

diff --git a/.nvmrc b/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/cli/csstools-cli/.nvmrc b/cli/csstools-cli/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e-package-managers/yarn/.nvmrc b/e2e-package-managers/yarn/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/.nvmrc b/e2e/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/browserslist/package-json/.nvmrc b/e2e/browserslist/package-json/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/interop/custom-media--design-tokens--global-data/.nvmrc b/e2e/interop/custom-media--design-tokens--global-data/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/postcss-cli/commonjs/.nvmrc b/e2e/postcss-cli/commonjs/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/postcss-cli/esm/.nvmrc b/e2e/postcss-cli/esm/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/typescript/commonjs/.nvmrc b/e2e/typescript/commonjs/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/typescript/esm/.nvmrc b/e2e/typescript/esm/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/webpack/bundle-through/.nvmrc b/e2e/webpack/bundle-through/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/e2e/webpack/postcss-loader/.nvmrc b/e2e/webpack/postcss-loader/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/experimental/css-has-pseudo/.nvmrc b/experimental/css-has-pseudo/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/experimental/postcss-gradient-stop-increments/.nvmrc b/experimental/postcss-gradient-stop-increments/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/experimental/postcss-nesting/.nvmrc b/experimental/postcss-nesting/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -54,6 +54,6 @@
 		"knip": "knip"
 	},
 	"volta": {
-		"node": "25.9.0"
+		"node": "26.1.0"
 	}
 }
diff --git a/packages/base-cli/.nvmrc b/packages/base-cli/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/cascade-layer-name-parser/.nvmrc b/packages/cascade-layer-name-parser/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/color-helpers/.nvmrc b/packages/color-helpers/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/css-calc/.nvmrc b/packages/css-calc/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/css-color-parser/.nvmrc b/packages/css-color-parser/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/css-parser-algorithms/.nvmrc b/packages/css-parser-algorithms/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/css-tokenizer/.nvmrc b/packages/css-tokenizer/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/generate-test-cases/.nvmrc b/packages/generate-test-cases/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/media-query-list-parser/.nvmrc b/packages/media-query-list-parser/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/selector-resolve-nested/.nvmrc b/packages/selector-resolve-nested/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/selector-specificity/.nvmrc b/packages/selector-specificity/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/packages/utilities/.nvmrc b/packages/utilities/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugin-packs/postcss-bundler/.nvmrc b/plugin-packs/postcss-bundler/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugin-packs/postcss-preset-env/.nvmrc b/plugin-packs/postcss-preset-env/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/css-blank-pseudo/.nvmrc b/plugins/css-blank-pseudo/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/css-has-pseudo/.nvmrc b/plugins/css-has-pseudo/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/css-prefers-color-scheme/.nvmrc b/plugins/css-prefers-color-scheme/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-alpha-function/.nvmrc b/plugins/postcss-alpha-function/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-attribute-case-insensitive/.nvmrc b/plugins/postcss-attribute-case-insensitive/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-base-plugin/.nvmrc b/plugins/postcss-base-plugin/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-browser-comments/.nvmrc b/plugins/postcss-browser-comments/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-cascade-layers/.nvmrc b/plugins/postcss-cascade-layers/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-function-display-p3-linear/.nvmrc b/plugins/postcss-color-function-display-p3-linear/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-function/.nvmrc b/plugins/postcss-color-function/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-functional-notation/.nvmrc b/plugins/postcss-color-functional-notation/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-hex-alpha/.nvmrc b/plugins/postcss-color-hex-alpha/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-mix-function/.nvmrc b/plugins/postcss-color-mix-function/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-color-rebeccapurple/.nvmrc b/plugins/postcss-color-rebeccapurple/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-conditional-values/.nvmrc b/plugins/postcss-conditional-values/.nvmrc
@@ -1 +1 @@
-v25.1.0
+v26.1.0
diff --git a/plugins/postcss-container-rule-prelude-list/.gitignore b/plugins/postcss-container-rule-prelude-list/.gitignore
@@ -0,0 +1,6 @@
+node_modules
+package-lock.json
+yarn.lock
+*.result.css
+*.result.css.map
+*.result.html
diff --git a/plugins/postcss-container-rule-prelude-list/.nvmrc b/plugins/postcss-container-rule-prelude-list/.nvmrc
@@ -0,0 +1 @@
+v26.1.0
diff --git a/plugins/postcss-container-rule-prelude-list/CHANGELOG.md b/plugins/postcss-container-rule-prelude-list/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Changes to PostCSS Container Rule Prelude List
+
+### Unreleased (major)
+
+- Initial version