输入中第11个逗号后发出警报

Question

I want to alert when user enter comma (,) 11th time. How can I do this with jQuery or js?

<input class='myprofiletags' name='my_profile_tags' value='<?php echo $my_profile_tags; ?>' placeholder="" />

What I am doing:

jQuery('.myprofiletags').keyup(function()
{
  if( jQuery(this).val().indexOf(',') !== -1 )
  {
      alert('No more text allowed');
  }
}

This script above always alerts, even when I press and character after one comma.

Any help would be appreciated.

Answer 1

按逗号分割，如果有10个以上，则发出警报：

jQuery(this).val().split(',').length > 10

Answer 2

A simple regular expression will handle this...

jQuery('.myprofiletags').keypress(function(e)
{
    if (jQuery(this).val().match(/,/g).length > 10)
    {
        e.preventDefault();  // stops the keypress occuring
        alert('No more text allowed');
    }
});

I also changed it to use keypress stopped further entry as your example code would alert the user, but not actually stop them entering further text.

jsfiddle example...

http://jsfiddle.net/3sah4xsm/