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node_modules/clean-css/lib/optimizer/level-1/value-optimizers/degrees.js

@@ -0,0 +1,19 @@
+var ZERO_DEG_PATTERN = /\(0deg\)/g;
+
+var plugin = {
+  level1: {
+    value: function degrees(_name, value, options) {
+      if (!options.compatibility.properties.zeroUnits) {
+        return value;
+      }
+
+      if (value.indexOf('0deg') == -1) {
+        return value;
+      }
+
+      return value.replace(ZERO_DEG_PATTERN, '(0)');
+    }
+  }
+};
+
+module.exports = plugin;