script.js

// Add active class to the current control button in navbar(highlight it)
var navContainer = document.getElementById("nav-ul-filters");
var navBtns = navContainer.getElementsByClassName("nav-link");
for (var t = 0; t < navBtns.length; t++) {
  navBtns[t].addEventListener("click", function() {
    var navcurrent = document.getElementsByClassName("nav-active");
    navcurrent[0].className = navcurrent[0].className.replace(" nav-active", "");
    this.className += " nav-active";
  });
}

// get the elements you want to animate

const jumbotron = document.querySelector('.jumbotron');
const text = document.querySelector('.float-txt');
const nav = document.querySelector('.n-scroll');


// jumbotron.style.transform = '50px';
// listen to the scroll event
window.addEventListener('scroll', function () {
    // get the scroll position
    const scrollPosition = window.pageYOffset;

    // update the elements based on the scroll position
    jumbotron.style.transform = `translateY(${scrollPosition * 0.5}px)`;
    text.style.transform = `translateY(${scrollPosition * 0.3}px)`;
    
    if (scrollPosition >= 900 ){
      jumbotron.style.transform = `translateY(0px)`;
    text.style.transform = `translateY(0px)`;
    }
    // console.log(scrollPosition);
    if (scrollPosition >= 200 ) {
        nav.classList.add("bg-white");
        nav.classList.add("trans-nav")
        nav.classList.remove("bg-transparent");
        nav.style.transform = `translateY(0px)`;
    } 
    else {
        nav.classList.add("bg-transparent");
        nav.classList.remove("bg-white");
        // nav.style.transform = `translateY(${scrollPosition * -0.5}px)`;
}
});

//     window.addEventListener('scroll', function () {
//         console.log("object");

// });

filterSelection("all");

function filterSelection(c) {
  var x, i;
  x = document.getElementsByClassName("filterDiv");
  if (c == "all") c = "";
  for (i = 0; i < x.length; i++) {
    w3RemoveClass(x[i], "show");
    if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
  }
}

function w3AddClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    if (arr1.indexOf(arr2[i]) == -1) {
      element.className += " " + arr2[i];
    }
  }
}

function w3RemoveClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    while (arr1.indexOf(arr2[i]) > -1) {
      arr1.splice(arr1.indexOf(arr2[i]), 1);
    }
  }
  element.className = arr1.join(" ");
}

// Add active class to the current control button in recent work section (highlight it)
var btnContainer = document.getElementById("ul-filters");
var btns = btnContainer.getElementsByClassName("nav-link");
for (var i = 0; i < btns.length; i++) {
  btns[i].addEventListener("click", function() {
    var current = document.getElementsByClassName("active");
    current[0].className = current[0].className.replace(" active", "");
    this.className += " active";
  });
}