Is there a feature in impress.js that allows for navigating to the following slide easily?

Impress.js is an innovative web presentation tool created with Javascript. I am interested in setting up custom events to navigate through the slides. This could involve adding buttons for "Next" and "Previous", for example.

The impress.js file itself functions as a single entity, where invoking selectPrev(); from within will advance to the next slide. Unfortunately, my expertise in Javascript is limited, and I'm unsure how to trigger selectPrev(); externally.

If you're curious, the impress.js file can be accessed at: https://github.com/bartaz/impress.js/blob/master/js/impress.js

javascript

Answer №1

Recently, impress.js underwent an update from the time this question was initially posed. It is now as easy as utilizing one of the following API methods:

impress().advance();
impress().rewind();
impress().moveTo(10);

I included this information just in case someone happens upon this question in the future.

Answer №2

From what I can see, the entire file appears to be encapsulated within a closure, with selectNext being locally defined within that closure. It is primarily used indirectly in the key listener, making it challenging to access from elsewhere.

Without altering the source code, there doesn't seem to be a straightforward method to reach selectPrev/selectNext.

A recent commit made about six hours ago mentioned:

A significant refactoring of slide selection - moving towards establishing an API

Based on this message, it appears that the developer intends to implement a proper API soon. If you can hold off for a bit, a standardized, officially supported, and hopefully documented way to interact with impress.js programmatically should become available.

Alternatively, if you're looking for a quick workaround, you could have your button trigger a key event. If you are using jQuery, the following code snippet can help achieve that:

$(document).trigger($.Event("keydown", { keyCode: 38 }))

Pressing 38 will navigate to the next slide, while pressing 40 will move to the previous slide.

Answer №3

For a better option, I suggest trying out jmpress.js. It's a jQuery version of impress.js with a user-friendly API that includes functions like next and prev.

Answer №4

Success! It is functional when the next and previous buttons are positioned inside the impress div.

$('#next').on('click', function(e){
    impress().next();
    e.stopPropagation();
});

$('#prev').on('click', function(e){
    impress().prev();
    e.stopPropagation();
});

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