How to solve beyond this

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
function nextInLine(arr, item) {
// Only change code below this line
console.log("Before: " + JSON.stringify(testArr));

 return item;

// Only change code above this line
}

// Setup
const testArr = [1, 2, 3, 4, 5];

// Display code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6));
console.log("After: " + JSON.stringify(testArr));

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36 Edg/102.0.1245.30

Challenge: Stand in Line

Link to the challenge:

Read about push() and shift() methods of the array