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- // TODO: Remove from `core-js@4`
- var uncurryThis = require('../internals/function-uncurry-this');
- var defineBuiltIn = require('../internals/define-built-in');
- var DatePrototype = Date.prototype;
- var INVALID_DATE = 'Invalid Date';
- var TO_STRING = 'toString';
- var nativeDateToString = uncurryThis(DatePrototype[TO_STRING]);
- var thisTimeValue = uncurryThis(DatePrototype.getTime);
- // `Date.prototype.toString` method
- // https://tc39.es/ecma262/#sec-date.prototype.tostring
- if (String(new Date(NaN)) != INVALID_DATE) {
- defineBuiltIn(DatePrototype, TO_STRING, function toString() {
- var value = thisTimeValue(this);
- // eslint-disable-next-line no-self-compare -- NaN check
- return value === value ? nativeDateToString(this) : INVALID_DATE;
- });
- }
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