Alert and not allow if same word written twice in an input jquery or js

Question

This is my input:

<input type='text' class='myprofiletags' name='my_profile_tags' value='' />

I want to alert and forbid the user if he/she writes the same word twice. I am entering values with commma e.g

games, animes, movies

jQuery('.myprofiletags').keypress(function(e)
    {
       if (jQuery(this).val().match(/,/g).length >= 10)
       {
            if(e.keyCode == 8 || e.keyCode == 46 || e.keyCode == 37 || e.keyCode == 38 || e.keyCode == 39 || e.keyCode == 40)
            {

            }
            else
            {
                e.preventDefault();  // stops the keypress occuring
                alert('No more profile tags are allowed');                                      
            }
         }
    });

Here is the link for solution http://stackoverflow.com/questions/24801985/jquery-validation-add-method-for-checking-duplicate-values-in-a-text-box — shankar.parshimoni, Dec 23 '14 at 05:57

score 0 · Accepted Answer · edited May 23 '17 at 12:20

Set an event handler (onkeyup) on input box so that whenever user hits a key the handler gets called
In event handler take the values of input box and split them on comma
Check if any value is duplicate
If no return true
If yes show an alert

Synopsis:

$(".myprofiletags").keydown (function (e) {
    alert ($(this).val());
});

You can also use change

$('input[name^="text"]').change(function() {

Edit: You are going in right direction, just split the value on comma and use each splitted value as an item of array.

See how to do that:

how do i check the value? can you please tell me – Hassan Ali Dec 23 '14 at 05:54 — Hassan Ali, Dec 23 '14 at 05:54

Alert and not allow if same word written twice in an input jquery or js

1 Answers1