How can I load all images in a folder?

Question

var img = new Image();
img.src = "images/myFolder/myImage.png";

The above will only load myImage.png. How to load all images of myFolder?

Solution 1

JavaScript can't directly access the contents of a file system. You'll have to pass the contents using a server-side script (written in PHP, etc) first.

Then once you have that, you can use a loop in your JavaScript to load them individually.

Solution 2

If your image names are sequential like your said, you can create a loop for the names, checking at every iteration if image exists - and if it doesn't - break the loop:

var bCheckEnabled = true;
var bFinishCheck = false;

var img;
var imgArray = new Array();
var i = 0;

var myInterval = setInterval(loadImage, 1);

function loadImage() {

    if (bFinishCheck) {
        clearInterval(myInterval);
        alert('Loaded ' + i + ' image(s)!)');
        return;
    }

    if (bCheckEnabled) {

        bCheckEnabled = false;

        img = new Image();
        img.onload = fExists;
        img.onerror = fDoesntExist;
        img.src = 'images/myFolder/' + i + '.png';

    }

}

function fExists() {
    imgArray.push(img);
    i++;
    bCheckEnabled = true;
}

function fDoesntExist() {
    bFinishCheck = true;
}

Solution 3

You need some way to get the list of files in that folder. This can either be defined manually as an array, or retrieved by an AJAX request to a server-side script that lists the files for you. Either way, there no "magic" method to get all the images in a folder.