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node_modules/core-js/internals/date-to-primitive.js

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+'use strict';
+var anObject = require('../internals/an-object');
+var ordinaryToPrimitive = require('../internals/ordinary-to-primitive');
+
+var $TypeError = TypeError;
+
+// `Date.prototype[@@toPrimitive](hint)` method implementation
+// https://tc39.es/ecma262/#sec-date.prototype-@@toprimitive
+module.exports = function (hint) {
+  anObject(this);
+  if (hint === 'string' || hint === 'default') hint = 'string';
+  else if (hint !== 'number') throw new $TypeError('Incorrect hint');
+  return ordinaryToPrimitive(this, hint);
+};