stricter parser

postcss · Aug 15, 2023 · e3df2ba · e3df2ba
1 parent 7e656ca
commit e3df2ba
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/lib/parse-statements.js b/lib/parse-statements.js
@@ -188,6 +188,21 @@ function parseImport(result, atRule, conditions, from) {
       (node.type === "word" || node.type === "function") &&
       /^layer$/i.test(node.value)
     ) {
+      if (layer.length > 0) {
+        return result.warn(`Multiple layers in '${atRule.toString()}'`, {
+          node: atRule,
+        })
+      }
+
+      if (supports.length > 0) {
+        return result.warn(
+          `layers must be defined before support conditions in '${atRule.toString()}'`,
+          {
+            node: atRule,
+          }
+        )
+      }
+
       if (node.nodes) {
         layer = [stringify(node.nodes)]
       } else {
@@ -198,6 +213,15 @@ function parseImport(result, atRule, conditions, from) {
     }
 
     if (node.type === "function" && /^supports$/i.test(node.value)) {
+      if (supports.length > 0) {
+        return result.warn(
+          `Multiple support conditions in '${atRule.toString()}'`,
+          {
+            node: atRule,
+          }
+        )
+      }
+
       supports = [stringify(node.nodes)]
 
       continue