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| 1 | +const slides = document.querySelectorAll('.slide'); |
| 2 | +const btnLeft = document.querySelector('.slider__btn--left'); |
| 3 | +const btnRight = document.querySelector('.slider__btn--right'); |
| 4 | +const dotContainer = document.querySelector('.dots'); |
| 5 | + |
| 6 | +let curSlide = 0; |
| 7 | +const maxSlide = slides.length; |
| 8 | + |
| 9 | +// Create Dots for each slides |
| 10 | +const createDots = function () { |
| 11 | + slides.forEach(function (_, i) { |
| 12 | + dotContainer.insertAdjacentHTML( |
| 13 | + 'beforeend', |
| 14 | + `<button class="dots__dot" data-slide="${i}"></button>` |
| 15 | + ); |
| 16 | + }); |
| 17 | +}; |
| 18 | + |
| 19 | +// Activate selected dot |
| 20 | +const activateDot = function (slide) { |
| 21 | + // remove active class from all dots |
| 22 | + document |
| 23 | + .querySelectorAll('.dots__dot') |
| 24 | + .forEach((dot) => dot.classList.remove('dots__dot--active')); |
| 25 | + |
| 26 | + // add active class to selected slide |
| 27 | + document |
| 28 | + .querySelector(`.dots__dot[data-slide="${slide}"]`) |
| 29 | + .classList.add('dots__dot--active'); |
| 30 | +}; |
| 31 | + |
| 32 | +// Move slider to selected slide |
| 33 | +const goToSlide = function (slide) { |
| 34 | + slides.forEach((s, i) => (s.style.transform = `translateX(${100 * (i - slide)}%)`)); |
| 35 | + activateDot(curSlide); |
| 36 | +}; |
| 37 | + |
| 38 | +// Next slide |
| 39 | +const nextSlide = function () { |
| 40 | + if (curSlide === maxSlide - 1) { |
| 41 | + curSlide = 0; |
| 42 | + } else { |
| 43 | + curSlide++; |
| 44 | + } |
| 45 | + goToSlide(curSlide); |
| 46 | +}; |
| 47 | + |
| 48 | +// Previous slide |
| 49 | +const prevSlide = function () { |
| 50 | + if (curSlide === 0) { |
| 51 | + curSlide = maxSlide - 1; |
| 52 | + } else { |
| 53 | + curSlide--; |
| 54 | + } |
| 55 | + goToSlide(curSlide); |
| 56 | +}; |
| 57 | + |
| 58 | +// IIFE - call immediately |
| 59 | +(() => { |
| 60 | + createDots(); |
| 61 | + goToSlide(0); |
| 62 | + activateDot(0); |
| 63 | + |
| 64 | + // Event handlers for left and right btns |
| 65 | + btnRight.addEventListener('click', nextSlide); |
| 66 | + btnLeft.addEventListener('click', prevSlide); |
| 67 | + |
| 68 | + // Event handlers for left and right btns with keyboard |
| 69 | + document.addEventListener('keydown', (e) => { |
| 70 | + if (e.key === 'ArrowLeft') prevSlide(); |
| 71 | + e.key === 'ArrowRight' && nextSlide(); |
| 72 | + }); |
| 73 | + |
| 74 | + // Event handlers to dot containers |
| 75 | + dotContainer.addEventListener('click', (e) => { |
| 76 | + if (e.target.classList.contains('dots__dot')) { |
| 77 | + const { slide } = e.target.dataset; |
| 78 | + goToSlide(slide); |
| 79 | + activateDot(slide); |
| 80 | + } |
| 81 | + }); |
| 82 | +})(); |
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