Stuck on Stand in Line I need help I don't know what is error

function nextInLine(arr, item) {
  // Only change code below this line
  arr.push(10)
   var x = arr.shift();
    return x;
  // Only change code above this line
}

i don’t see what is the problem here?

Add console.log(nextInLine([], 1)); somewhere at the bottom of code, after the function, and see what is returned by function for that case.

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).