quizEngine/js/engine.js

22 lines
498 B
JavaScript

export function imagePreloader(images, callback) {
let counter = 0;
function onLoad() {
counter += 1;
if (counter == images.length) callback();
}
for (let i of images) {
let img = document.createElement('img');
img.onload = img.onerror = onLoad;
img.src = `assets/images/${i}`;
}
}
export function shuffle(array) {
for (let i = array.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[array[i], array[j]] = [array[j], array[i]];
}
}