How can I intercept events?

[RainingC]

Can those events be intercept??? Thanks!!!!!!

For example

For example , I click the Thumbnail's next button; I want to control the whole viewerjs to wait 3s and loading; Then switch to the next image;

[fengyuanchen]

1. Some cancelable events (such as show, hide, view, etc) can be canceled by event.preventDefault().
2. For your usage case, you can use the toolbar option to customize the click handler of the next button.