Roadmap

v2.x - Maintenance Mode

No new features are being worked on for v2.x.

v3.0 - In Brainstorming Phase

Not planned for v3.0 The goal of this script from it's beginnings till today is to to provide a better image viewing experience.

HTML or video content. If you need to show html or video content, I recommend googling for an alternative script as there are many options.
Social sharing buttons.

Image Support

Investigate srcset and <picture>

Interactions

Add touch gesture support.
Exploring using tilt gesture on mobile devices with extra-wide images.
If user attempts to go forward when at end of image set, animation (shake?) indicating the end or option to close Lightbox.
Make sure right-click/long pressing works to access the image's context menu.

Layout

Allow vertical centering.
Update sizing on window resize.
Should the dev be able to choose the position of the caption, close button, and nav controls?
Optimize layout for mobile.
Optimize layout for screens of varying densities.
Should the close button still live in the bottom right corner?

Animations

Evaluate start, end, and transition animations.
Rewrite animations for performance and flexibility.

Assets

Use inline SVG for UI elements.

Caching

Review if and how images should be preloaded

Error Handling

What happens when an image url is incorrect?
What happens when an image takes too long to load?

Accessibility

Should opening lightbox update the url? and should this url be parsed on page load to show Lightbox automatically?
Review alt attributes.
Review ARIA roles.
Review constrast ratios.
Review keyboard input and tabbing.
Review click/touch target size.
Test with screen reader.

API

Do not initialize automatically and allow multiple instances.
Add event handlers.
Allow setting options on the fly.
Allow the setting of options from HTML?
Evaluate preloading and caching.
Allow placement inside of a specified element? Orig feature requester was dealing with iframe.

Dependencies

Drop jQuery requirement.