Docs "Overview: Progress bar" page is out-of-date

[becky-gilbert]

The v8 "progress bar" docs page in the Overview section looks to be out of date. It says that you can manually update the progress bar like this:

jsPsych.progressBar.progress = 0.85;

But the reference page shows that this has been changed to setProgressBar, which takes the value as an argument, like this:

jsPsych.setProgressBar(0.85);

I assume the latter is correct.

[jodeleeuw]

Actually I think it's the other way around. We updated to .progress in v8, so the setProgressBar method in reference should be removed. (I should double check this...)