Filtro elementi






Codice HTML

 <!-- Control buttons -->
<div id="myBtnContainer">
 <button class="btn active" onclick="filterSelection('all')"> Mostra tutti</button>
 <button class="btn" onclick="filterSelection('macchine')"> Macchine</button>
 <button class="btn" onclick="filterSelection('animali')"> Animali</button>
 <button class="btn" onclick="filterSelection('frutti')"> Frutti</button>
 <button class="btn" onclick="filterSelection('colori')"> Colori</button>
</div>

<!-- The filterable elements. Note that some have multiple class names (this can be used if they belong to multiple categories) --> <div class="container"> <div class="filterDiv macchine">BMW</div> <div class="filterDiv frutti">Arancia</div> <div class="filterDiv macchine">Volvo</div> <div class="filterDiv colori">Rosso</div> <div class="filterDiv animali">Cavallo</div> <div class="filterDiv macchine">Audi</div> <div class="filterDiv colori">Blu</div> <div class="filterDiv animali">Gatto</div> <div class="filterDiv animali">Cane</div> <div class="filterDiv frutti">Melone</div> <div class="filterDiv frutti">Kiwi</div> <div class="filterDiv frutti">Banana</div> <div class="filterDiv frutti">Limone</div> <div class="filterDiv animali">Tigre</div> <div class="filterDiv colori">Arancione</div> <div class="filterDiv colori">Giallo</div>

</div>



Codice CSS

.container {
 overflow: hidden;
}

.filterDiv { float: left; background-color: #2196F3; color: #ffffff; width: 100px; line-height: 100px; text-align: center; margin: 2px; display: none; /* Hidden by default */ }

/* The "show" class is added to the filtered elements */ .show { display: block; }

/* Style the buttons */ .btn { border: none; outline: none; padding: 12px 16px; background-color: #f1f1f1; cursor: pointer; }

/* Add a light grey background on mouse-over */ .btn:hover { background-color: #ddd; }

/* Add a dark background to the active button */ .btn.active { background-color: #666; color: white; }



Codice Javascript

<script>
 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++) {
 w3RemoveClass(x[i], "show");
 if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
 }
}

// Show filtered elements 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]; } } }

// Hide elements that are not selected 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 (highlight it) var btnContainer = document.getElementById("myBtnContainer"); var btns = btnContainer.getElementsByClassName("btn"); 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"; }); } </script>