Javascript TypeError ____ is not a function

Question

I am currently using the Chrome console to do some debugging for a Greasemonkey script.

From the console I run var opp = document.querySelectorAll(\'a[class=\"F-re

Answer 1

querySelector/All returns a NodeList not an array, so those functions are not available.

You can use call to use those array methods though

[].splice.call(opp,0,1);

The first argument is the execution context that the function will use, all other arguments are the arguments that will be passed to the function

Function call reference