AM/PM to 24-Hour-Based Time Converter Javascript

script.js

function amPmConversion(time = "") {

  const arr = time.split(":");

  const amPm = arr.slice(2,3).join("").split("").slice(2,4).join("");
  let converted = ["", arr[1], arr.slice(2,3).join("").split("").slice(0,2).join("")];

  if (amPm === "PM") {
    if (arr[0] === "12") {
      converted[0] = "12"
    } else {
      converted[0] = (Number(arr[0]) + 12).toString();
    }
  }

  if (amPm === "AM") {
    if (arr[0] === "12") {
      converted[0] = "00"
    } {
      converted[0] = arr[0];
    }
  }

  return converted.join(":");
}

// Example in AM
const am = "06:40:03AM";
console.log(amPmConversion(am)); // Will return 06:40:03
// Example in PM
const pm = "07:05:07PM";
console.log(amPmConversion(pm)); // Will return 19:05:07