javascript - 如何将具有 mm/dd/yyyy 格式的日期与分隔各部分的特定符号匹配？

Question

所以我知道如何让它在某个地方接受任何符号，但我将如何使用正则表达式来匹配这样的日期:

12-12-1212
12.12.1212
12/12/1212

但不匹配使用任何其他符号的日期:

12~12~1212
12=12=1212

Answer 1

描述

(?:0[1-9]|1[012])([-.\/])(?:0[1-9]|[1-2][0-9]|3[01])\1(?:[0-9]{4})

此正则表达式将执行以下操作:

• 匹配格式类似于日期的子字符串 mm-dd-yyyy
• 允许分隔符为-、.、/
• 要求两个分隔符相同
• 验证月份仅在 01-12 范围内
• 验证日期只能在 01-31 范围内

例子

现场演示

https://regex101.com/r/mT0kE8/2

示例文本

mm-dd-yyyy

12-12-1212
12.12.1212
12/12/1212
But NOT match to dates using any other symbols like this:

12~12~1212
12=12=1212

样本匹配

• 捕获组 0 获取整个日期
• 捕获组 1 获取分隔符以确保它们相同

[0][0] = 12-12-1212
[0][1] = -

[1][0] = 12.12.1212
[1][1] = .

[2][0] = 12/12/1212
[2][1] = /

解释

NODE                     EXPLANATION
----------------------------------------------------------------------
  (?:                      group, but do not capture:
----------------------------------------------------------------------
    0                        '0'
----------------------------------------------------------------------
    [1-9]                    any character of: '1' to '9'
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    1                        '1'
----------------------------------------------------------------------
    [012]                    any character of: '0', '1', '2'
----------------------------------------------------------------------
  )                        end of grouping
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    [-.\/]                   any character of: '-', '.', '\/'
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  (?:                      group, but do not capture:
----------------------------------------------------------------------
    0                        '0'
----------------------------------------------------------------------
    [1-9]                    any character of: '1' to '9'
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    [1-2]                    any character of: '1' to '2'
----------------------------------------------------------------------
    [0-9]                    any character of: '0' to '9'
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    3                        '3'
----------------------------------------------------------------------
    [01]                     any character of: '0', '1'
----------------------------------------------------------------------
  )                        end of grouping
----------------------------------------------------------------------
  \1                       what was matched by capture \1
----------------------------------------------------------------------
  (?:                      group, but do not capture:
----------------------------------------------------------------------
    [0-9]{4}                 any character of: '0' to '9' (4 times)
----------------------------------------------------------------------
  )                        end of grouping
----------------------------------------------------------------------