How to Round off Time to Nearest 5 Min using JavaScript?

let date = new Date();

console.log("Initial Date: ", date);

function roundDownDate() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedDownDate = 
    	new Date(Math.floor(new Date() / coff) * coff);
    console.log("Rounded Down Date: ", roundedDownDate);
}

function roundUpDate() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedUpDate = new Date(Math.ceil(new Date() / coff) * coff);
    console.log("Rounded Up Date: ", roundedUpDate);
}

roundDownDate();
roundUpDate();

let date = new Date();

console.log("Original Date: ", date);

function roundOff() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedDate = new Date(Math.round(date.getTime() / coff) * coff);
    console.log("Rounded Date: ", roundedDate);
}

roundOff();