JavaScript: convert 12 hours time string to 24 hour time string

JSConvert12to24Time.js

// NOTE: time string must look like this 07:05:45PM or this 07:05:45AM and account for 12:00:00AM and convert 12:00:00pm to 12:00:00
function timeConversion(s) {
    const ampm = s.slice(-2);
    const hours = Number(s.slice(0, 2));
    let time = s.slice(0, -2);
    if (ampm === 'AM') {
        if (hours === 12) { // 12am edge-case
            return  time.replace(s.slice(0, 2), '00');
        }
        return time;
    } else if (ampm === 'PM') {
        if (hours !== 12) {
            return time.replace(s.slice(0, 2), String(hours + 12));
        } 
        return time; // 12pm edge-case
    }
    return 'Error: AM/PM format is not valid';
}

// less lines using array.split/join and modulus (not my solution)
function timeConversionSlicker(s) {
    let AMPM = s.slice(-2);
    let timeArr = s.slice(0, -2).split(":");
    if (AMPM === "AM" && timeArr[0] === "12") {
        // catching edge-case of 12AM
        timeArr[0] = "00";
    } else if (AMPM === "PM") {
        // everything with PM can just be mod'd and added with 12 - the max will be 23
        timeArr[0] = (timeArr[0] % 12) + 12
    }  
    return timeArr.join(":");
}

const time = '12:10 AM';

function convertTo24HrsFormat(time) {
// write your solution here
let [hours, min] = time.split(":");
let [minutes, mode] = min.split(" ");
if(time.endsWith("AM")){
if (hours == 12) {
hours = 12-hours;
hours="0"+hours;
//console.log(hours)
}else if (hours < 10) {
hours="0"+hours;
//console.log(hours)
}
else{
//console.log(hours)
}
if (minutes < 10) {
minutes=parseInt(minutes)
minutes="0"+minutes;
//console.log(minutes)
}else{
//console.log(minutes)
}
//sMinutes = "0" + sMinutes;
} else if(time.endsWith("PM")){
if(hours<12){
hours = parseInt(hours)+12
//console.log(hours)
}
if (minutes < 10) {
minutes = parseInt(minutes)
minutes="0"+minutes;
//console.log(minutes)
}else{
//console.log(minutes)
}
}
return ${hours}:${minutes};
}

console.log(Converted time: ${convertTo24HrsFormat(time)})