Question

this code in book jQuery in action page 131

i don’t understand

.trigger(‘adjustName’);

what is adjustName

and Simple explanation for trigger()

thanks 🙂

$('#addFilterButton').click( function() {
    var filterItem = $('<div>')
    .addClass('filterItem')
    .appendTo('#filterPane')
    .data('suffix','.' + (filterCount++));
    $('div.template.filterChooser')
    .children().clone().appendTo(filterItem)
    .trigger('adjustName');
});

Answer 1

It is a string, the name of a custom event you defined.

E.g. it would trigger the event handler bound by:

el.bind('adjustName', function(){...});

For more information I suggest to have a look at the documentation:

Any event handlers attached with .bind() or one of its shortcut methods are triggered when the corresponding event occurs. They can be fired manually, however, with the .trigger() method. A call to .trigger() executes the handlers in the same order they would be if the event were triggered naturally by the user.

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Without knowing the context of the code, I would say that calling .trigger() here has no effect, as it is called on the cloneed elements and the event handlers are only cloned if true is passed to clone.