Billed galleri med filter - hjælp til script
Har fundet nedenstående kode. det er nok nemmere at se her https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_portfolio_gallery_filterJeg vil gerne have at den starter på cars og kune viser denne category fra start af - men jeg kan ikke gennemskue javascripten. Er der nogle der kan hjælpe mig?
På forhånd tak
/Nikolaj
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {
box-sizing: border-box;
}
body {
background-color: #f1f1f1;
padding: 20px;
font-family: Arial;
}
/* Center website */
.main {
max-width: 1000px;
margin: auto;
}
h1 {
font-size: 50px;
word-break: break-all;
}
.row {
margin: 10px -16px;
}
/* Add padding BETWEEN each column */
.row,
.row > .column {
padding: 8px;
}
/* Create three equal columns that floats next to each other */
.column {
float: left;
width: 33.33%;
display: none; /* Hide all elements by default */
}
/* Clear floats after rows */
.row:after {
content: "";
display: table;
clear: both;
}
/* Content */
.content {
background-color: white;
padding: 10px;
}
/* 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: white;
cursor: pointer;
}
.btn:hover {
background-color: #ddd;
}
.btn.active {
background-color: #666;
color: white;
}
</style>
</head>
<body>
<!-- MAIN (Center website) -->
<div class="main">
<h1>MYLOGO.COM</h1>
<hr>
<h2>PORTFOLIO</h2>
<div id="myBtnContainer">
<button class="btn active" onclick="filterSelection('all')"> Show all</button>
<button class="btn" onclick="filterSelection('nature')"> Nature</button>
<button class="btn" onclick="filterSelection('cars')"> Cars</button>
<button class="btn" onclick="filterSelection('people')"> People</button>
</div>
<!-- Portfolio Gallery Grid -->
<div class="row">
<div class="column nature">
<div class="content">
<img src="/w3images/mountains.jpg" alt="Mountains" style="width:100%">
<h4>Mountains</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column nature">
<div class="content">
<img src="/w3images/lights.jpg" alt="Lights" style="width:100%">
<h4>Lights</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column nature">
<div class="content">
<img src="/w3images/nature.jpg" alt="Nature" style="width:100%">
<h4>Forest</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column cars">
<div class="content">
<img src="/w3images/cars1.jpg" alt="Car" style="width:100%">
<h4>Retro</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column cars">
<div class="content">
<img src="/w3images/cars2.jpg" alt="Car" style="width:100%">
<h4>Fast</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column cars">
<div class="content">
<img src="/w3images/cars3.jpg" alt="Car" style="width:100%">
<h4>Classic</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column people">
<div class="content">
<img src="/w3images/people1.jpg" alt="Car" style="width:100%">
<h4>Girl</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column people">
<div class="content">
<img src="/w3images/people2.jpg" alt="Car" style="width:100%">
<h4>Man</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<div class="column people">
<div class="content">
<img src="/w3images/people3.jpg" alt="Car" style="width:100%">
<h4>Woman</h4>
<p>Lorem ipsum dolor..</p>
</div>
</div>
<!-- END GRID -->
</div>
<!-- END MAIN -->
</div>
<script>
filterSelection("all")
function filterSelection(c) {
var x, i;
x = document.getElementsByClassName("column");
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 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>
</body>
</html>
