Change font size dynamically based on character count

Question

Context: I have very basic experience with JavaScript. I mainly know HTML/CSS well.

Let's say I want to fill 1,000 pages with 1,000 phrases. One phrase per page, and the text has to fill the maximum amount of space in the page.

So I think I would need something like this: If "Hello there" is 60pt to fill the page, but the next page contains "How are you?" dynamically change the font size to fit the page (like 40pt). Am I on the right track or should I do something else?

I understand this may have something to do with strings and character counts. I have found some clues in JavaScript but also need help changing some of the language to work in InDesign.

jquery - Change Font Size dynamically based on Character count - Stack Overflow

jquery - Auto-size dynamic text to fill fixed size container - Stack Overflow

Peter Kahrel · Answer

Character count is not a useful way to fit text in a frame. You can change the type size in small steps until the text fits the frame. Or better yet, check Marc Autret's site, he had a function (which I think he also showed in this forum), which uses a more sophisticated method to fit text to a frame. I don't have a link to that specific function -- Marc's site is at www.indiscripts.com.

P.

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