JavaScript bind method polyfill. JS interview question every developer should know.
Polyfill is basically back support of methods that our old browser doesn’t support.
It's a very popular question on any JavaScript interview. How .bind() method works? Can we rebind already bound function?
To understand it we'll create our own bind polyfill and check how it works inside. The main trick is using js closure. In this case, context is inside closure and it's impossible to change context.
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