URL of experiment: http://pavlovia.org/ps2/envelopes Description of the problem: I created the skeleton of a new experiment in the Builder, and received the titular error when trying to run it online for the first time. There is nothing fancy in the experiment—text, polygons, and mouse responses o…

Try this [image] TypeError cannot read property '0' of undefined in Pavlovia Online experiments Removing var worked. Thank you!

Ah, I should’ve mentioned that the above is the js code itself, not something inside a code component in Builder. So, removing var would simply lead to a different error (reference error rather than type error) in this case, since the variable is not otherwise defined. Thanks for the suggestion thou…

"prevButtonState is undefined" error

Online experiments

wakecarter July 14, 2020, 3:20pm 2

Try this

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"prevButtonState is undefined" error

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