How can you detect the end of reading results & other comments! about rosbag.js

[jtbandes]

Hi, and thanks for your interest!

The readMessages() function returns a Promise on which you can use .then() or await to detect when reading is finished. Here's an example using await in an async function from the tests, where execution won't continue until the bag has been fully read:

rosbag.js/src/bag.test.js

Lines 32 to 34 in 5455293

	await bag.readMessages(opts, (msg) => {
	messages.push(msg);
	});

As of the latest changes in #20, a build step shouldn't be required if you're making a static page; as I noted in that PR summary, you can simply use <script src="node_modules/rosbag/dist/web/index.js"></script> which will expose a rosbag object. We haven't published this version to npm yet but I'll do that shortly; thanks for the reminder! (I'll fix the BagOptions docs as well 😃)

[gkjohnson]

Great! Thank you so much for the fast response -- I missed the documentation about readResults returning a promise. I'll look forward to the next release.