Question

以下测试用例的结果是什么？

                                                    //Chrome 19     Opera 12       Firefox 11    IE 9          Safari 5.1.1
console.log(Date.parse("2012-11-31T23:59:59.000Z"));//1354406399000 NaN            NaN           1354406399000 NaN
console.log(Date.parse("2012-12-31T23:59:59.000Z"));//1356998399000 1356998399000  1356998399000 1356998399000 1356998399000
console.log(Date.parse("2012-12-31T23:59:60.000Z"));//NaN           NaN            NaN           NaN           1356998400000
console.log(Date.parse("2012-04-04T05:02:02.170Z"));//1333515722170 1333515722170  1333515722170 1333515722170 1333515722170
console.log(Date.parse("2012-04-04T24:00:00.000Z"));//NaN           1333584000000  1333584000000 1333584000000 1333584000000
console.log(Date.parse("2012-04-04T24:00:00.500Z"));//NaN           NaN            1333584000500 1333584000500 NaN
console.log(Date.parse("2012-12-31T10:08:60.000Z"));//NaN           NaN            NaN           NaN           1356948540000
console.log(Date.parse("2012-13-01T12:00:00.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-12-32T12:00:00.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-12-31T25:00:00.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-12-31T24:01:00.000Z"));//NaN           NaN            NaN           1356998460000 NaN
console.log(Date.parse("2012-12-31T12:60:00.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-12-31T12:00:60.000Z"));//NaN           NaN            NaN           NaN           1356955260000
console.log(Date.parse("2012-00-31T23:59:59.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-12-00T23:59:59.000Z"));//NaN           NaN            NaN           NaN           NaN
console.log(Date.parse("2012-02-29T12:00:00.000Z"));//1330516800000 1330516800000  1330516800000 1330516800000 1330516800000
console.log(Date.parse("2011-02-29T12:00:00.000Z"));//1298980800000 NaN            NaN           1298980800000 NaN
console.log(Date.parse("2011-03-01T12:00:00.000Z"));//1298980800000 1298980800000  1298980800000 1298980800000 1298980800000

// extended years:
console.log(Date.parse("0000-01-01T00:00:00.000Z"));//-621672192e5  -621672192e5   -621672192e5  -621672192e5  -621672192e5
console.log(Date.parse("+275760-09-13T00:00:00.000Z"));//8.64e15    NaN            8.64e15       8.64e15       8.64e15
console.log(Date.parse("-271821-04-20T00:00:00.000Z"));//-8.64e15   NaN            -8.64e15      -8.64e15      -8.6400000864e15
console.log(Date.parse("+275760-09-13T00:00:00.001Z"));//NaN        NaN            NaN           8.64e15 + 1   8.64e15 + 1
console.log(Date.parse("-271821-04-19T23:59:59.999Z"));//NaN        NaN            NaN           -8.64e15 - 1  -8.6400000864e15 - 1

// https://github.com/kriskowal/es5-shim/issues/80 Safari bug with leap day
console.log(Date.parse("2034-03-01T00:00:00.000Z") -
            Date.parse("2034-02-27T23:59:59.999Z"));//86400001      86400001       86400001       86400001      1

// Time Zone Offset
console.log(Date.parse("2012-01-29T12:00:00.000+01:00"));//132783480e4 132783480e4  132783480e4  132783480e4    132783480e4
console.log(Date.parse("2012-01-29T12:00:00.000-00:00"));//132783840e4 132783840e4  132783840e4  132783840e4    132783840e4
console.log(Date.parse("2012-01-29T12:00:00.000+00:00"));//132783840e4 132783840e4  132783840e4  132783840e4    132783840e4
console.log(Date.parse("2012-01-29T12:00:00.000+23:59"));//132775206e4 132775206e4  132775206e4  132775206e4    132775206e4
console.log(Date.parse("2012-01-29T12:00:00.000-23:59"));//132792474e4 132792474e4  132792474e4  132792474e4    132792474e4
console.log(Date.parse("2012-01-29T12:00:00.000+24:00"));//NaN         1327752e6    NaN          1327752000000  1327752000000
console.log(Date.parse("2012-01-29T12:00:00.000+24:01"));//NaN         NaN          NaN          1327751940000  1327751940000
console.log(Date.parse("2012-01-29T12:00:00.000+24:59"));//NaN         NaN          NaN          1327748460000  1327748460000
console.log(Date.parse("2012-01-29T12:00:00.000+25:00"));//NaN         NaN          NaN          NaN            NaN
console.log(Date.parse("2012-01-29T12:00:00.000+00:60"));//NaN         NaN          NaN          NaN            NaN
console.log(Date.parse("-271821-04-20T00:00:00.000+00:01"));//NaN      NaN          NaN          -864000000006e4 -864000008646e4
console.log(Date.parse("-271821-04-20T00:01:00.000+00:01"));//-8.64e15 NaN          -8.64e15     -8.64e15        -864000008640e4

似乎ECMAScript应该更具体针对边缘情况;目前是说无效的日期格式是依赖于实现的，我是对的吗？

Answer 1

根据ES5规范，Date.parse仅适用于有效的ISO 8601日期。其他任何东西都依赖于实现（实际上，IE＆lt; 9不适用于标准ISO日期，它需要'/'分隔符）。因此，如果您提供无效日期（例如2012-11-31），您可以从2012-12-01获得任何错误。

在你的测试中：

2012-12-31T23:59:60.000Z

应该可行，但可能不如您所期望的那样。使用 60 秒表示闰秒，它不等于24:00:00，只有Safari似乎正确。

此外：

2012-04-04T24:00:00.000Z

应该有效，它表示2012年4月4日午夜，所以Firefox出现了错误。

ES5实施应支持的格式位于spec。

哦，你应该也可以测试'T'的遗漏（因为在某些情况下它是可选的，我认为包括浏览器）和不同的时区，例如：

2012-04-03 23:50:00+10:00
2012-04-03 23:50:00-04:15
2012-04-03 23:50:00+10
20120403T235000+1000

使用YYYYDDD和YYYYWwwD格式

等等，但不需要实现来支持它们。

ECMAScript 5针对ISO 8601测试用例的Date.parse结果

1 个答案: