Sequencing animations

MDN Learn
#1

alice1.animate(aliceTumbling, aliceTiming).finished

.then(() => alice2.animate(aliceTumbling, aliceTiming).finished)

.then(() => alice3.animate(aliceTumbling, aliceTiming).finished)

.catch(error => console.error(Error animating Alices: ${error}));

Hello, could you explain what finished is here for?

#2

Finished contains the Promise returned by the animate call. We then chain then onto the Promise to set the next step in the operation.