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Comments on Function.prototype.call()
Post
Function.prototype.call()
I wanted to print to browser console the number of li list items of a given ul list.
This didn't work (console output was undefined):
console.log(document.querySelectorAll(".example").length);
This worked (console output was a plausible number):
[].filter.call(
document.getElementsByClassName('example')[0].children,
function (el) {
return el.nodeName === 'LI';
}
).length
My question
It was written in the MDN page for Function.prototype.call():
The call() method calls a function with a given this value and arguments provided individually.
But in the working code there was no "this".
What is the meaning of "call" in the second code?
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