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node_modules/core-js/internals/set-is-subset-of.js

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+'use strict';
+var aSet = require('../internals/a-set');
+var size = require('../internals/set-size');
+var iterate = require('../internals/set-iterate');
+var getSetRecord = require('../internals/get-set-record');
+
+// `Set.prototype.isSubsetOf` method
+// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf
+module.exports = function isSubsetOf(other) {
+  var O = aSet(this);
+  var otherRec = getSetRecord(other);
+  if (size(O) > otherRec.size) return false;
+  return iterate(O, function (e) {
+    if (!otherRec.includes(e)) return false;
+  }, true) !== false;
+};