表单字段的最小和最大长度

Is there a way to set a min and max length of 15 numbers (numbers only) in my form field?

有没有办法在我的表单字段中设置15个数字(仅限数字)的最小和最大长度?

I've tried:

pattern".{15,15}"

Here's the JSFiddle: http://jsfiddle.net/aScpD/2/

这是JSFiddle:http://jsfiddle.net/aScpD/2/

3 个解决方案

#1

Try

\d --> for numbers

\ d - >代表数字

Fiddle Demo

pattern="\d{15,15}"

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Update as commented by s1lence

pattern="\d{15}"

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Update to set Custom validation message

Add this attribute to input field

将此属性添加到输入字段

oninvalid="this.setCustomValidity('15 digit number needed')"

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Use as commented by Jukka K. Korpela (check above fiddle for working demo)

使用Jukka K. Korpela评论(检查以上小提琴的工作演示)

title="Exactly 15 digits"

#2

You can also do it like this.

你也可以这样做。

<input title="requires exactly 15 digits" maxlength="15" pattern=".{15}" required />

Demo

#3

Try this:

pattern = /[0-9]{15}/

• [0-9] match a number (safer than \d because \d matches also foreign number) Edit: According to Bergi, it's not true in JS, but it's still valid in a lot of Perl RegEx implementations.

  [0-9]匹配一个数字(比\ d更安全,因为\ d匹配外部数字)编辑:根据Bergi,它在JS中不是真的,但它在许多Perl RegEx实现中仍然有效。

• {15} is similar to {15, 15}.

  {15}类似于{15,15}。