Restrict number of selections and insert selected data into an array

Question

I have 15 list items. I allow user to pick only 5 out of them. Then I put this info into the array and submit to the server.

<li><a href="#" id="item1" class="select">Item One</a></li> ... etc.

Then I use this code to toggle class of selected items

function SelectPrizes (){
$('a.select').click(function() {
    $(this).toggleClass("selected");
    $(this).text($(this).text() == 'Choose prize' ? 'Selected' : 'Choose prize');
    return false;
});
}

My question is, how to allow only 5 selections and add only selected items to an array by ID.

I understand that I can filter by hasClass('selected'), but I can't figure out the right syntax for that.

score 1 · Answer 1 · answered Apr 16 '12 at 10:33

You could use slice(start, end) to get a specific number of results from the selection, starting from the specified index.

var results = $("a.select").slice(0, 5);

The second part of your question can be answered with a conditional check:

if ($(this).hasClass("selected")) {

}

score 1 · Answer 2 · answered Apr 16 '12 at 10:35

1

Check following value for submission decision about whether 5 elements are selected are not -

$('a.select[class*="selected"]').length==5

answered Apr 16 '12 at 10:35

Ashim Saha

152
4

score 1 · Accepted Answer · answered Apr 16 '12 at 11:02

To answer your three questions:

Allowing 5 selections: Make sure the length of $('a.select.selected') doesn't exceed your limit of 5:

if ( $('a.select.selected').length < 5 ) {
    // Does not exceed, so we can add...
}

Add only selected items to array: just add only those items with the class 'selected':

$('a.select.selected').each(function(){
    // Add to array
});

The syntax of hasClass('selected') as Mr. Disappointment suggested:

if ( $(this).hasClass('selected') ) {

}

The solution of Mr. Disappointment will work if you allow the user to select more than 5 items and then select just any 5 of them.

Also, a suggestion to improve your html. I assume the li items have a ul parent. Set the class 'select' to this ul parent and use the selector: $('ul.select li a').click().

I've put this all together in a jsfiddle for you: http://jsfiddle.net/5b8aj/6/

Awesome. Thank you so much, I have rewritten my code, mine was kinda nasty. — jonny pixel, Apr 17 '12 at 09:26

Restrict number of selections and insert selected data into an array

3 Answers3