Javascript Print from within Storyline course

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I am hoping there is an expert on the line that can help me out.

We are currently trying to use javascript to automatically print a slide within our course. The javascript we found is so simple, we don't understand why it isn't working: window.print();

We have published in Storyline 2 and Storyline 3. We have tried SCORM 1.2 and SCORM 2004. We cannot get the slide to print consistently across the major browsers: IE11, Firefox, and Chrome.

Does anyone have a course in the LMS with print functionality built into a button?

Thank you in advance!!