Priority Plus

The short stuff

• Vanilla JS, dependency free. Available as an ES6 module or browser global.
• Uses the IntersectionObserver API instead of width-based calculations.
• Toggles the appropriate WAI-ARIA attributes to remain accessible.
• Provides a class hook to style the menu differently when all items are in the overflow/hidden.
• Provides a way to update the overflow toggle button with the hidden item count.