JavaScript Jquery eq(index out of bound) and children

This is actually two question. I was playing around with the .eq method in jquery and decided to test it out using jsfiddle. What puzzles me is that when I supply an index that is obviously out of bound it still returns me an obj instead of an index out of bound error.

console.log($("body").children("div").eq(2));
console.log($("body").children("div").eq(20));

So I did this using the .children method from jquery. Upon closer inspection if I specify a selector it gives me the correct children, but if I do not it also returns the title element which is outside of the body.

console.log($("body").children());
console.log($("body").children("div"));

Does anybody know why? Here is the jsfiddle

Answer:1

No Index out of bounds

This was just a choice of the jQuery developers. If a selector returns no results, it will be an empty jQuery collection rather than return an error.

$("body").children("div").eq(20).length === 0

<title> appears in <body>

jsfiddle.net automatically has <html>, <head>, and <body> elements. Everything in the HTML frame is already wrapped in <body>. The <body> you provide is ignored. I do find it odd that <title> ends up being acceptable there, though.

Answer:2

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