javascript - Why can't console.log be called using .call() -

the below code returns pop-up window 'hello'.

alert.call(this, 'hello'); 

but below code returns error "typeerror: illegal invocation".

console.log.call(this, 'hello'); 

what difference in implements of alert , console.log?

alert global method (window.alert). if call alert.call(this), this window object.

because log method in console object, expects this console object itself, still calling this(window), error.

running console.log.call(console, 'test') work fine.