Snackbars are where software engineers go to load up on chips and guacamole. Just kidding. They're brief messages that appear at the bottom of the screen.
npm install --save-dev @smui/snackbarhttps://sveltematerialui.com/demo/snackbar
See Snackbars in the Material design spec.
See Snackbar in MDC-Web for information about the upstream library's architecture.