Created
June 7, 2023 17:34
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Provides different values of "this" depending if running in strict mode or not.
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/* sloppy mode */ | |
/* It always return an object. Boxes "this" in a primitive object if a primitive value is provided or the global object otherwise */ | |
function fun() { | |
return this; | |
} | |
fun.call(2) // Number(2) | |
fun.bind(true)() //Boolean(true) | |
fun.call(null) //window object | |
func.apply(undefined) //window object | |
fun() //window object | |
/* stric mode */ | |
/* it always returns the provided value for this or undefined. it never Boxes "this" in a primitive object nor assing the global object by default */ | |
function fun() { | |
"use strict"; | |
return this; | |
} | |
fun.call(2) // 2 | |
fun.bind(true)() // true | |
fun.call(null) // null | |
fun.apply(undefined) //undefined | |
fun() //undefined |
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