--- /dev/null
+"use strict";
+
+const rangeOperatorRegex = /[^><](>=?|<=?|=)/g;
+
+module.exports = function(atRule, cb) {
+ if (atRule.name.toLowerCase() !== "media") {
+ return;
+ }
+
+ const params = atRule.params;
+ let match;
+ while ((match = rangeOperatorRegex.exec(params)) !== null) {
+ cb(match, params, atRule);
+ }
+};