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  • "If you call a function with the new keyword, that function becomes a constructor and the this keyword will not point to the current object but instead to a newly created "empty" one". If you call a function without the new keyword, this will refer to the calling context, by default the global object (window). In strict mode, undefined is the default. call, apply and bind takes calling context as first parameter. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… Commented May 3, 2019 at 8:18