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Update script.js #2

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155 changes: 55 additions & 100 deletions assets/js/script.js
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Original file line number Diff line number Diff line change
@@ -1,149 +1,104 @@
'use strict';



/**
* add event listener on multiple elements
* Utility to add event listener to multiple elements
*/

const addEventOnElements = function (elements, eventType, callback) {
for (let i = 0, len = elements.length; i < len; i++) {
elements[i].addEventListener(eventType, callback);
}
}


const addEventOnElements = (elements, eventType, callback) => {
elements.forEach(element => element.addEventListener(eventType, callback));
};

/**
* PRELOADER
* Preloader
*/

const preloader = document.querySelector("[data-preloader]");

window.addEventListener("DOMContentLoaded", function () {
preloader.classList.add("loaded");
window.addEventListener("DOMContentLoaded", () => {
preloader?.classList.add("loaded");
document.body.classList.add("loaded");
});



/**
* NAVBAR
* navbar toggle for mobile
* Navbar toggle functionality for mobile
*/

const navTogglers = document.querySelectorAll("[data-nav-toggler]");
const navToggleBtn = document.querySelector("[data-nav-toggle-btn]");
const navbar = document.querySelector("[data-navbar]");
const overlay = document.querySelector("[data-overlay]");

const toggleNavbar = function () {
navbar.classList.toggle("active");
navToggleBtn.classList.toggle("active");
overlay.classList.toggle("active");
const toggleNavbar = () => {
navbar?.classList.toggle("active");
navToggleBtn?.classList.toggle("active");
overlay?.classList.toggle("active");
document.body.classList.toggle("nav-active");
}
};

addEventOnElements(navTogglers, "click", toggleNavbar);



/**
* HEADER
* header active when window scroll down to 100px
* Header behavior on scroll
*/

const header = document.querySelector("[data-header]");

window.addEventListener("scroll", function () {
window.addEventListener("scroll", () => {
if (window.scrollY >= 100) {
header.classList.add("active");
header?.classList.add("active");
} else {
header.classList.remove("active");
header?.classList.remove("active");
}
});



/**
* SLIDER
* Initialize all sliders on the page
*/

const sliders = document.querySelectorAll("[data-slider]");

const initSlider = function (currentSlider) {

const sliderContainer = currentSlider.querySelector("[data-slider-container]");
const sliderPrevBtn = currentSlider.querySelector("[data-slider-prev]");
const sliderNextBtn = currentSlider.querySelector("[data-slider-next]");

let totalSliderVisibleItems = Number(getComputedStyle(currentSlider).getPropertyValue("--slider-items"));
let totalSlidableItems = sliderContainer.childElementCount - totalSliderVisibleItems;

let currentSlidePos = 0;

const moveSliderItem = function () {
sliderContainer.style.transform = `translateX(-${sliderContainer.children[currentSlidePos].offsetLeft}px)`;
}

/**
* NEXT SLIDE
*/
const slideNext = function () {
const slideEnd = currentSlidePos >= totalSlidableItems;
const initSlider = (slider) => {
const sliderContainer = slider.querySelector("[data-slider-container]");
const sliderPrevBtn = slider.querySelector("[data-slider-prev]");
const sliderNextBtn = slider.querySelector("[data-slider-next]");

if (slideEnd) {
currentSlidePos = 0;
} else {
currentSlidePos++;
}
let visibleItems = Number(getComputedStyle(slider).getPropertyValue("--slider-items"));
let totalItems = sliderContainer?.childElementCount ?? 0;
let maxPosition = totalItems - visibleItems;

moveSliderItem();
}
let currentPosition = 0;

sliderNextBtn.addEventListener("click", slideNext);
const moveSlider = () => {
const offset = sliderContainer.children[currentPosition]?.offsetLeft || 0;
sliderContainer.style.transform = `translateX(-${offset}px)`;
};

/**
* PREVIOUS SLIDE
*/
const slidePrev = function () {
if (currentSlidePos <= 0) {
currentSlidePos = totalSlidableItems;
} else {
currentSlidePos--;
}
const slideNext = () => {
currentPosition = (currentPosition >= maxPosition) ? 0 : currentPosition + 1;
moveSlider();
};

moveSliderItem();
}
const slidePrev = () => {
currentPosition = (currentPosition <= 0) ? maxPosition : currentPosition - 1;
moveSlider();
};

sliderPrevBtn.addEventListener("click", slidePrev);
sliderNextBtn?.addEventListener("click", slideNext);
sliderPrevBtn?.addEventListener("click", slidePrev);

const dontHaveExtraItem = totalSlidableItems <= 0;
if (dontHaveExtraItem) {
sliderNextBtn.style.display = 'none';
sliderPrevBtn.style.display = 'none';
if (maxPosition <= 0) {
sliderNextBtn.style.display = "none";
sliderPrevBtn.style.display = "none";
}

/**
* slide with [shift + mouse wheel]
*/

currentSlider.addEventListener("wheel", function (event) {
if (event.shiftKey && event.deltaY > 0) slideNext();
if (event.shiftKey && event.deltaY < 0) slidePrev();
// Support horizontal scroll with Shift + mouse wheel
slider.addEventListener("wheel", (e) => {
if (!e.shiftKey) return;
e.preventDefault();
e.deltaY > 0 ? slideNext() : slidePrev();
});

/**
* RESPONSIVE
*/

window.addEventListener("resize", function () {
totalSliderVisibleItems = Number(getComputedStyle(currentSlider).getPropertyValue("--slider-items"));
totalSlidableItems = sliderContainer.childElementCount - totalSliderVisibleItems;

moveSliderItem();
window.addEventListener("resize", () => {
visibleItems = Number(getComputedStyle(slider).getPropertyValue("--slider-items"));
maxPosition = sliderContainer.childElementCount - visibleItems;
moveSlider();
});
};

}

for (let i = 0, len = sliders.length; i < len; i++) { initSlider(sliders[i]); }
// Initialize each slider
sliders.forEach(initSlider);