Hello World text in images on Pavlovia

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Hello World! normally appears when you try to display an undefined variable

Wakefield's Daily Tips

ReferenceError: varName is not defined This is one of the most common errors in online experiments [image] It is also one of the easiest to solve. The issue is one of “scope”. To define a variable so it has scope across your whole experiment, all you have to do is assign it a value. Don’t edit your JavaScript to add “var” or “let” commands. To give your variable scope assign the value in a Begin Experiment code component tab outside any clauses (i.e. no Python indents). [image] I usually s…

If you delete all the old data files and then sync they will be deleted online as well.