我正在尝试使用以下代码:
<form>
<input pattern=".{5}|{10}">
<input type="submit" value="Check"></input>
</form>
看来必须有某种方法使其起作用?
编辑澄清:我不想允许9,10,11,12,13。我只想允许8或14
谢谢,
nb:由于某种原因,我无法使用Jquery Validation插件。
最佳答案
您可以通过以下正则表达式模式指定它:
^.{8}$|^.{14}$
这是您的代码如下所示:
<form>
<input pattern="^.{8}$|^.{14}$">
<input type="submit" value="Check"></input>
</form>
铁路图:
描述:
NODE EXPLANATION
----------------------------------------------------------------------
^ the beginning of a "line"
----------------------------------------------------------------------
.{8} any character except \n (8 times)
----------------------------------------------------------------------
$ before an optional \n, and the end of a
"line"
----------------------------------------------------------------------
| OR
----------------------------------------------------------------------
^ the beginning of a "line"
----------------------------------------------------------------------
.{14} any character except \n (14 times)
----------------------------------------------------------------------
$ before an optional \n, and the end of a
"line"
----------------------------------------------------------------------
) end of grouping
----------------------------------------------------------------------
Demo