script.js

// --------------============++++++Project section++++++++++_________=======-----------
        filterSelection("all")
        function filterSelection(c) {
          var x, i;
          x = document.getElementsByClassName("filterDiv");
          if (c == "all") c = "";
          // Add the "show" class (display:block) to the filtered elements, and remove the "show" class from the elements that are not selected
          for (i = 0; i < x.length; i++) {
            RemoveClass(x[i], "shows");
            if (x[i].className.indexOf(c) > -1) AddClass(x[i], "shows");
          }
        }
        
        // Show filtered elements
        function AddClass(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];
            }
          }
        }
        
        // Hide elements that are not selected
        function RemoveClass(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 (highlight it)
        var btnContainer = document.getElementById("myBtnContainer");
        var btns = btnContainer.getElementsByClassName("btn-project");
        for (var i = 0; i < btns.length; i++) {
          btns[i].addEventListener("click", function() {
            var current = document.getElementsByClassName("active");
            current[1].className = current[1].className.replace(" active", "");
            this.className += " active";
          });
        }