Alertify按钮的OnClick事件

Question

I'm trying to display a message that the user has clicked Delete button when he/she clicks on it. This is what I'm doing:

<script>
    $('#button_del').on('click',function(e){
        alertify.error('You have clicked on Delete!');
    });
</script>

But no message appears when I click on the button. What am I doing wrong?

Answer 1

There are only four possibilities here:

1. You don't load your libraries correctly: jQuery and alertify.
2. There is no element with the button_del ID, or there are markup errors involving it.
3. You're not actually clicking #button_del .

4. the most likely one :

You need to attach the click handler when the document is loaded, otherwise #button_del is probably not available/loaded yet!

$(document).ready(function() {
    $('#button_del').on('click',function(e){
        alertify.error('You have clicked on Delete!');
    });
});

Even if the first three conditions are met, you'd still have to change this.