How can I measure a scroll depth? (Instant Article)

For example, I look through the screen http://skrinshoter.ru/s/111119/2QibEcCi?a
Is there any possibility to measure where 80% of the page is?

Hey @Vasily_Korotich, could you explain in more detail what you’re asking for? :slightly_smiling_face:

Hello, hello. Sure. I would like to find out fragments of text or pics which prompt readers to get off articles. But I can’t decide how I should measure a scroll depth for any particular text. I want to figure out the method to split each text on 10%, 20%, 30% and so on.