first commit

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

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+var QUOTED_URL_PATTERN = /^url\(['"].+['"]\)$/;
+var QUOTED_URL_WITH_WHITESPACE_PATTERN = /^url\(['"].*[*\s()'"].*['"]\)$/;
+var QUOTES_PATTERN = /["']/g;
+var URL_DATA_PATTERN = /^url\(['"]data:[^;]+;charset/;
+
+var plugin = {
+  level1: {
+    value: function urlQuotes(_name, value, options) {
+      if (options.compatibility.properties.urlQuotes) {
+        return value;
+      }
+
+      return QUOTED_URL_PATTERN.test(value)
+        && !QUOTED_URL_WITH_WHITESPACE_PATTERN.test(value)
+        && !URL_DATA_PATTERN.test(value)
+        ? value.replace(QUOTES_PATTERN, '')
+        : value;
+    }
+  }
+};
+
+module.exports = plugin;