I am working in Storyline 360. I followed instructions, and got the widget to work, but it is in the top left corner of the slide, and less than half as the length of the slide. I would like the widget to be below the slide, and the width of the slide, like in your demo at: https://cluelabs.com/widget-demos/progress-bar/index.html
How can I do this? I don't know how to set the location of the widget or the length of the widget with javascript.

Tracy, you set the position of the progress bar when you create the widget in the editor. It's the fields that are labeled "Horizontal position..." and "Vertical position..." If you leave these values as "0" and "0" then the progress bar will be positioned at coordinates 0,0 (top left-hand corner). You can go back and adjust these values to position the widget as needed.

Thank you! I didn't notice that when I created my progress bar--this solves my problem.