Why doesn't prototype see the variable from the constructor?

Question

JavaScript

learn.javascript.ru/play/HviXUb Clicking
on the block should display Hello World, but world = undefiend. If you just call this.hello () in the constructor, then everything works
---
while I'm considering such a solution from the options, but maybe it's possible somehow else?

...
var that = this;
...
this.div.on('click', function(){
that.hello()
})
...

Answer 1

think in the right direction.
https://developer.mozilla.org/en-US/docs/Web/JavaS...