fix prefix:; adding a 0 as prefix for variables. closes: #3807

Author: saadeghi

packages/daisyui/functions/addPrefix.js

@@ -132,6 +132,7 @@ const processArrayValue = (value, prefix, excludedPrefixes) => {
 }
 
 const processStringValue = (value, prefix, excludedPrefixes) => {
+  if (prefix === 0) return value
   return value.replace(/var\(--([^)]+)\)/g, (match, variableName) => {
     if (shouldExcludeVariable(variableName, excludedPrefixes)) {
       return match

packages/daisyui/functions/addPrefix.test.js

@@ -399,3 +399,25 @@ test("addPrefix with nested combinators and :not(:has()) selector", () => {
   }
   expect(addPrefix(input, prefix)).toEqual(expected)
 })
+
+// with 0 prefix
+test("addPrefix with 0 prefix should not affect CSS variables", () => {
+  const input = {
+    "--custom-var": "10px",
+    "--another-var": "var(--custom-var)",
+    ".btn": {
+      margin: "var(--custom-var)",
+      "--local-var": "20px",
+    },
+  }
+  const prefix = 0
+  const expected = {
+    "--custom-var": "10px",
+    "--another-var": "var(--custom-var)",
+    ".btn": {
+      margin: "var(--custom-var)",
+      "--local-var": "20px",
+    },
+  }
+  expect(addPrefix(input, prefix)).toEqual(expected)
+})