"r.emulateMediaType is not a function" error when exporting images about marp-cli HOT 2 CLOSED

Thanks for your report. 😃

I guess it causes by different Puppeteer version in docker image. We are using compatible version with Chromium that was installed to alpine image, and typically it becomes a bit older than for master branch.

emulateMediaType is a new API provided by Puppeteer v2, so the conversion within our container image would fail if it had used v1. Probably we have to give a fallback into v1's deprecated function emulateMedia. (bb97a19)

from marp-cli.

Now the latest image has installed compatible Chromium 79 with Puppeteer v2.

$ docker pull marpteam/marp-cli
$ docker run --rm --entrypoint="" marpteam/marp-cli chromium-browser --version
Chromium 79.0.3945.88 
$ docker run --rm --init -v $PWD:/home/marp/app/ -e LANG=$LANG marpteam/marp-cli markdown.md --image png
[  INFO ] Converting 1 markdown...
[  INFO ] markdown.md => markdown.png

from marp-cli.