Is there a way to limit the number of tags a user can add to an input field using Select2?
I have:
$('#tags').select2({
containerCssClass: 'supplierTags',
placeholder: "Usual suppliers...",
minimumInputLength: 2,
multiple: true,
tokenSeparators: [",", " "],
placeholder: 'Usual suppliers...',
createSearchChoice: function(term, data) {
if ($(data).filter(function() {
return this.name.localeCompare(term) === 0;
}).length === 0) {
return {id: 0, name: term};
}
},
id: function(e) {
return e.id + ":" + e.name;
},
ajax: {
url: ROOT + 'Call',
dataType: 'json',
type: 'POST',
data: function(term, page) {
return {
call: 'Helpers->tagsHelper',
q: term
};
},
results: function(data, page) {
return {
results: data.tags
};
}
},
formatResult: formatResult,
formatSelection: formatSelection,
initSelection: function(element, callback) {
var data = [];
$(element.val().split(",")).each(function(i) {
var item = this.split(':');
data.push({
id: item[0],
name: item[1]
});
});
callback(data);
}
});
It would be great if there could be/is a simple parameter like limit: 5
and a callback to fire when the limit is reached.
Sure, with maximumSelectionLength
like so:
$("#tags").select2({
maximumSelectionLength: 3
});
Maximum Selection Length
Select2 allows the developer to limit the number of items that can be selected in a multi-select control.
It has no native callback, but you can pass a function to formatSelectionTooBig
like this:
$(function () {
$("#tags").select2({
maximumSelectionLength: 3,
formatSelectionTooBig: function (limit) {
// Callback
return 'Too many selected items';
}
});
});
Or you could extend formatSelectionTooBig
like this:
$(function () {
$.extend($.fn.select2.defaults, {
formatSelectionTooBig: function (limit) {
// Callback
return 'Too many selected items';
}
});
$("#tags").select2({
maximumSelectionLength: 3
});
});
Edit
Replaced maximumSelectionSize
with the updated maximumSelectionLength
. Thanks @DrewKennedy!