What library should be used to detect block magnification with fingers on a phone?

Question

css

Actually, the task is, there is a block, you need to determine whether they are trying to increase it with their fingers on the phone or reduce it, depending on the action - to execute your script. What can you advise?

Answer 1

https://codepen.io/topicstarter/pen/JqgxpQ is it??

Answer 2

Hammer.js