What is the correct way to wait for a response in a promise?

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  DD, help please how to perform such an action: there is a certain variable that at the moment of initialization has the value undefined, how to wait with the help of a promise when the value will be! = Undefined and after that execute the block instruction
  .then (), maybe I misunderstood the promise

  JavaScript Ava Foley, Jan 16, 2019

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1 Answers
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  Generally misunderstood. Promises are commonly used with asynchronous functions and their job is to get ANY response from them. And this answer can be either number / string / array / object, etc., or undefined, null, etc.
  
  Observers are worth looking at for tracking variables.
  
  https://developer.mozilla.org/en/docs / Web / JavaScri ...
  
  I do not know any other options to monitor the variable (if you do not take into account the Timeout set, but it is).

  Anonymous

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