tailing the cosmosdb change feed

fromBeginning.js

const options = { startFromBeginning: true };

fromContinuation.js

const { headers } = await container.items.create({ ... });
const lsn = headers["lsn"];
const options = { continuation: lsn };

fromNow.js

const options = {};

fromPointInTime.js

const options = { startTime: new Date() }; // any Date object will do

init.js

const changeFeed = container.items.readChangeFeed(partitionKey, options);

install

npm install --save @azure/cosmos

iterate.js

while (changeFeed.hasMoreResults) {
  const { result } = await changeFeed.executeNext();
  // do what you want with the result / changes
}