Scripts in action can't work

Hi, I'm new to contstruct3.

I want to run javascript code from event sheet like beginning of this video.

youtube.com/watch

But When I Pressed a button in preview mode, It didn't work.

Chrome developer tool shows there is an error like below.

Yeah, I did not define "alert" or include some libraries, but in tutorial video, it can work just write "alert(***);" in action.

Is there setting or something I am missing?

Construct now defaults to running your projects in a Web Worker for performance reasons.

For scripting this means a more limited set of methods are available. It's described in the manual in the 'Worker mode' section of JavaScript in Construct.

The easiest thing to do is untick 'Use worker' in Project Properties.

Also note when you create a new project, if you choose to start with script 'Use worker' is already turned off.

A better place to start would be to try using console.log("Hello world!") which is supported in a worker as well.

Thank you Ashley! now I can run my script from event sheet.

This seems to keep coming up so FYI as of r194, the runtime patches in a global alert() function in worker mode. However it works slightly differently (since it's not blocking in the worker). I'd still suggest using console.log() or something else that works everywhere instead.

Hello Ashley,

Could we also have a global prompt() function working in web workers mode, please?

I need to prompt the user to input short texts and I'd like it to be through a native browser popup, which is the only simple solution I could find to properly adapt the user experience to screen size, keyboard etc. The javascript prompt() function is very convenient to achieve this, but it can't be used in web workers mode.

Thank you!