let a = "asd";
toString.call(a); //returns [object String]
How come this is different from a.toString();? Shouldn't the value of this within the toString function be 'a' in both scenarios? I anticipated it to display "asd" (similar to a.toString()).
The method you would utilize is window.toString, but it is recommended to use:
String.prototype.toString.call(b) // the outcome will remain consistent
There are various methods that go by the name of toString, each with its own unique behavior. In addition to @xdazz's answer, let's explore how toString differs in different types:
[].toString.call("abc"); //Array
Even here, the result is not "abc".
document.querySelectorAll("*").toString.call("abc") //Node List
Again, this does not give us "abc".
(2).prototype.toString.call("abc") //Number
An error occurs, and it's worth noting that toString in Number can also receive a radix argument.
In conclusion, these methods all have distinct behaviors. Due to its peculiar nature as an Object, even window has a different implementation of toString compared to String's.
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