/-1|2147483647|524288/是什么意思啊？

Question

1楼是正确的
下面这些都是true的
<script>
var re = /-1|2147483647|524288/;
alert(re.test('-1'));
alert(re.test('-1xxx'));
alert(re.test('2147483647'));
alert(re.test('xxxx2147483647'));
alert(re.test('524288'));
alert(re.test('xx524288xx'));
</script>

Answer 1

1楼是正确的
下面这些都是true的
<script>
var re = /-1|2147483647|524288/;
alert(re.test('-1'));
alert(re.test('-1xxx'));
alert(re.test('2147483647'));
alert(re.test('xxxx2147483647'));
alert(re.test('524288'));
alert(re.test('xx524288xx'));
</script>已测, 是我错了