How can I make a program wait for a variable change in javascript?

Question

I want to force a JavaScript program to wait in some particular points of its execution until a variable has changed. Is there a way to do it? I have already found an extens

Answer 1

JavaScript is one of the worst program\scripting language ever!

"Wait" seems to be impossible in JavaScript! (Yes, like in the real life, sometimes waiting is the best option!)

I tried "while" loop and "Recursion" (a function calls itself repeatedly until ...), but JavaScript refuses to work anyway! (This is unbelievable, but anyway, see the codes below:)

while loop:

Recursion:

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