Expression or reg-ex for javascript or adobe livec

问题:

What will be the expression for restricting a user to enter either 5 lines or 375 characters in a scrollable text field?

I tried theese:

([A-Z])\w+

$0</a>

var re,regs,val;
if(OTHER.rawValue!=null)
{
   val=OTHER.rawValue;
   //re=[a-zA-Z\d\s\-\,\#\.\+]+
   //re=/abc(?!$){5}/ 
   re=/\be(\w*)s\b/m{2,10}$;
   regs=val.match(re);
   if(!regs)
   {
     fieldname.rawValue="";
     xfa.host.messageBox("ANY THING");
     xfa.host.setFocus(fieldname)
   }
}

re=/abc(?!$){5}/

and many more... but I am not getting exact one to validate either 5 lines or 375 characters

回答1:

Try this:^((.+\n){0,4}.+|.{1,375})$

$(document).ready(function() {

  $("#text_string").focusout(function() {
    var res, text_string = $("#text_string").val();
    if (text_string != null) {

      res = text_string.match(/^((.+\n){0,4}.+|.{1,375})$/);
      console.log(res);
      if (!res) {
        $("#text_string").val("");
      }
    }
  });

});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<textarea name="" id="text_string" cols="30" rows="10"></textarea>