Live Update in JavaScript

I have a random increase for a bunch of variables, I used setIntervel() to have something like a live update for the variables but they don’t seem to update:

    const no= document.getElementById("no");
    const ni= document.getElementById("no");
    const nu= document.getElementById("no");
    const ny= document.getElementById("no");
    const nt= document.getElementById("no");
    const visit = document.getElementById("visited");
    let a = sessionStorage.getItem("a") ? parseInt(sessionStorage.getItem("a")) : 1;
    let b = sessionStorage.getItem("b") ? parseInt(sessionStorage.getItem("b")) : 1;
    let x = sessionStorage.getItem("x") ? parseInt(sessionStorage.getItem("x")) : 1;
    let y = sessionStorage.getItem("y") ? parseInt(sessionStorage.getItem("y")) : 1;
    let z = sessionStorage.getItem("z") ? parseInt(sessionStorage.getItem("z")) : 1;
    let display;

    no.onclick = function(){
        sessionStorage.setItem("a", a + 1);
        window.location.href = "no.html";
    }

    ni.onclick = function(){
        sessionStorage.setItem("b", b + 1);
        window.location.href = "ni.html";
    }

    nu.onclick = function(){
        sessionStorage.setItem("x", x + 1);
        window.location.href = "nu.html";
    }

    ni.onclick = function(){
        sessionStorage.setItem("y", y + 1);
        window.location.href = "ny.html";
    }

    nt.onclick = function(){
        sessionStorage.setItem("z", z + 1);
        window.location.href = "nt.html";
    }

    function update(){
        if(a > b && a > x && a > y && a > z){
            display = "Popular Now: no";
            visit.textContent = display;
        }
        else if(b > a && b > x && b > y && b > z){
            display = "Popular Now: ni";
            visit.textContent = display;
        }
        else if(x > a && x > b && x > y && x > z){
            display = "Popular Now: nu";
            visit.textContent = display;
        }
        else if(y > a && y > b && y > x && y > z){
            display = "Popular Now: ny";
            visit.textContent = display;
        }
        else if(z > a && z > b && z > x && z > y){
            display = "Popular Now: nt";
            visit.textContent = display;
        }
    }

    setInterval(() => {
        let i = Math.floor(Math.random() * 5 + 1);

        if (i === 1) {
            sessionStorage.setItem("a", parseInt(sessionStorage.getItem("a") || 0) + 1);
        } else if (i === 2) {
            sessionStorage.setItem("b", parseInt(sessionStorage.getItem("b") || 0) + 1);
        } else if (i === 3) {
            sessionStorage.setItem("x", parseInt(sessionStorage.getItem("x") || 0) + 1);
        } else if (i === 4) {
            sessionStorage.setItem("y", parseInt(sessionStorage.getItem("y") || 0) + 1);
        } else {
            sessionStorage.setItem("z", parseInt(sessionStorage.getItem("z") || 0) + 1);
        }

        update();
    }, 5000);

The live update should occur right after the values increase meaning that it isn’t using outdated values, yet I have to manually reload the page to see the change, and if anybody can offer a more random way of adding to the values I would like to know it, also don’t mind the weird variable and button names, it is not something I would like to share online, Thanks.

I was expecting a live update for the popular now part