Unfortunately. you have to Math.log10 the x/y position https://codepen.io/alexcjohnson/pen/yLGPgdE

You shouldn't have to do this, but there's no way for us to fix this is in a backward compatible way.

@etpinard Your solution is wrong ,, you must use: Math.log(x)/ Math.log(10) because Math.log is base E.

or use Math.log10.

thanks @ricardovb

The same Bug on Plotly for R. Solved in the same way. Thank you!

Ran into this today - thanks for the workaround!

Another option occurred to me while responding to @orenbenkiki's suggestion plotly/dash#916 (comment) - we could imagine adding a new axis attribute like coordinates: 'legacy'|'data' to opt into the "v2" behavior.

I actually suggested adding a value to the ref attributes: xref='X' or xref='x!' or xref='x_with_transformations' or something along these lines. Adding a new attribute might be cleaner, though.

The above suggestions of using the log of the value to make the annotation do not work either when using log axes and adding an hline with annotation:

fig.add_hline( y=1E6, line_color="red", annotation_text="Lower limit", annotation_position="top left", )
The hline is drawn at the correct place, but the annotation is shown a some monstrously large value on the y-axis. How would one go about fixing this?

Here is another example of how poorly log coordinates work:
https://community.plotly.com/t/wrong-annotation-location-of-vrect-on-log-graph/58550/2

Unfortunately. you have to Math.log the x/y position http://codepen.io/etpinard/pen/oYJwLx

You shouldn't have to do this, but there's no way for us to fix this is in a backward compatible way.

Seems like this example is broken by now.

Oh that example is using the wrong flavor of log, should be log10 https://codepen.io/alexcjohnson/pen/yLGPgdE - thanks @Turakar