正则表达式可在键入时验证日期mm / dd / yyyy [英] Regex to validate date mm/dd/yyyy while typing
问题描述
我正在尝试为自定义文本字段编写一个正则表达式,以便在发生更改时将测试输入,如果测试失败,将不允许用户编写该字符。
I'm trying to write a regex for a custom text field so that, when a change occurs the input will be tested and if the test fails, user won't be allowed to write that character.
我知道也有类似的问题询问,但我无法适应该正则表达式。
I know there is a similar question asked, but I couldn't manage to adapt that regex.
到目前为止,我已经花了很多编写
So far I've spent a lot of time writing a regex like
,但仍然允许一些不需要的输入,例如:
but still it allows some unwanted inputs such as:
- 1212/2012
- 12121212
- 12/121212
任何帮助将不胜感激。
编辑:
每次用户键入 单个字符 时,Regex都应进行验证,因此这些输入也应通过regex:
Regex should validate each time user types a single character, so these inputs should pass regex too:
- 12 /
- 12/0
- 12/01
- 12/01 /
- 12/01/2
- 12/
- 12/0
- 12/01
- 12/01/
- 12/01/2
推荐答案
^([0-9] {1,2}){1}(\ / [0-9] {1,2}){0,1}(\ / [0-9] {0,4}){0,1} $
^([0-9]{1,2}){1}(\/[0-9]{1,2}){0,1}(\/[0-9]{0,4}){0,1}$
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