Question

So I wish to check a variable called SRC against the source of images in a list from my HTML and if it returns true then run a certain function.

It seems that it is not currently running properly, please see the link for a live example.

http://jsbin.com/exigop/4/edit

Answer 1

You should check the length property whenever you check for any element which is missing in your code.

if ($('ul li img[src=' + src + ']').length > 0) {
  //code here
}

Also you had few other issues in the code like using src as attribute selector which will not work because it cantains / and it is not escaped.

I have fixed those issues and also improvised the code. Take a look

Working demo