jQuery Regex Check：没有最小长度？

Question

this is my code:

<input type="text" id="Desc" placeholder="Beschreibung (Optional)'"  pattern="^[a-zA-Z\wäöüÄÖÜß\- ][a-zA-Z0-9\wäöüÄÖÜß\- ][\w-.,@&amp;(){}\[\]:;!?\wäöüÄÖÜß\- ]{,150}$" />            

What is should do: ignore when field is empty (no minimum chars)

But it doesnt work...

What am I doing wrong?

DoJoChi

Answer 1

尝试以下方法： pattern="(^[a-zA-Z\\wäöüÄÖÜß\\- ][a-zA-Z0-9\\wäöüÄÖÜß\\- ][\\w-.,@&(){}\\[\\]:;!?\\wäöüÄÖÜß\\- ]{,150}$)?"

Answer 2

Try this:

<input type="text" id="Desc" placeholder="Beschreibung (Optional)'"  pattern="^[a-zA-Z\wäöüÄÖÜß\- ][a-zA-Z0-9\wäöüÄÖÜß\- ][\w.,@&amp;(){}\[\]:;!?\wäöüÄÖÜß\- ]{5,150}$" />

The problem where first of all w- doesnt do anything, use w+ or w? or only w Second problem {,150} isnt anything use {10,150} which means if it is minimum 10 chars.

Copy the regex and pase it to http://regexpal.com/ and you can try it out. Hope this helps you out.

Answer 3

It seems you forgot to put brackets and a ? to make the whole regex optional. I'm also pretty sure {,150} isn't a valid syntax. It should be {x,150} where x is a number between 0 and 149.

So, in the end, your regular expression should be something like:

^([a-zA-Z\wäöüÄÖÜß\- ][a-zA-Z0-9\wäöüÄÖÜß\- ][\w-.,@&(){}\[\]:;!?\wäöüÄÖÜß\- ]{1,150})?$