Error when pan scatter with empty text

[inDream]

Change https://github.com/plotly/plotly.js/blob/master/src/components/drawing/index.js#L54
from if(isNumeric(x) && isNumeric(y)) { to if(isNumeric(x) && isNumeric(y) && sel.node()) {
solved this problem.

Demo: https://jsfiddle.net/indream/6L8nLgr1/

[rreusser]

Thanks so much for the report and for tracking this down! That makes pretty good sense. Would you be willing to make a PR for this? This might be small and straightforward enough that it doesn't require a specific test (debatably), but it's still necessary to ensure the tests as a whole are fine. The basic process is:

1. fork the repo
2. make the fix
3. run npm run lint-fix, commit, and push to your branch
4. file a PR

That would be greatly appreciated but no pressure. If not I'll try to get a PR together for it. Thanks again!