Animated snackbar example broken for inline demo

[jaygray0919]

for https://amp.dev/documentation/examples/visual-effects/animated_snackbar/?format=websites#asd

/s/dissappear/disappear

also, the inline example (for the target page) does not work as advertised in the sample code (it does not disappear according to the terms in the code). in contrast, playground works as advertised

[patrickkettner]

fixed typo in d17751b

snackbar does work, but you need to scroll way down and way back up - might be some kind of optimization that is only triggering the animation if something is in the viewport?

[jaygray0919]

agree - it does not work as advertised in the sample code; it has different behavior.

[patrickkettner]

absolutely! your report was correct, just wanted to add some context for anyone looking at a fix