How to implement object jump in javascript?

Question

JavaScript

There is a code that implements the movement of an object to the right and left. But I can't do the jump. Here is the code
https://codepen.io/tiyzz/pen/gdNrXE

Answer 1

please here is the implementation:
https://codepen.io/lastuniverse/pen/gdNwXX
https://jsfiddle.net/3b5g2mhe/10/
demo entry on youtube