Learn how to create auto-closing notifications using HTML popover attributes combined with CSS transitions and JavaScript ResizeObserver. The technique uses CSS height transitions with @starting-style and transition-delay to visually hide the popover, while ResizeObserver detects when the animation completes to properly close the popover element. Includes fallback strategies for when JavaScript is disabled.
Table of contents
Let’s start with the popoverHiding the popover with a CSS transitionClosing the popover with JavaScriptSetting an HTML fallbackWhen to use this method?Sort: