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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| export default class TestimonialCarousel { | ||
| constructor (carousel) { | ||
| this.CAROUSEL = carousel; | ||
| this.ITEMS = carousel.querySelectorAll('.c-testimonial'); | ||
| this.IS_LARGE_SCREEN = this.isLargeScreen(); | ||
|
|
||
| this.init(this.ITEMS); | ||
| this.windowResize(); | ||
| this.addButtonListeners(); | ||
| } | ||
|
|
||
| // eslint-disable-next-line class-methods-use-this | ||
| init() { | ||
| // If desktop show two first card, else just one | ||
| const keys = Array.from(this.ITEMS.keys()); | ||
| const show = this.IS_LARGE_SCREEN ? keys.slice(0,2) : keys.slice(0,1); | ||
| const hide = this.IS_LARGE_SCREEN ? keys.slice(2) : keys.slice(1); | ||
| const buttons = this.CAROUSEL.parentElement.querySelectorAll('.c-testimonials__button'); | ||
|
|
||
| if (hide.length === 0) { | ||
| buttons.forEach((button) => { | ||
| button.classList.add('u-display--none'); | ||
| }); | ||
| } else { | ||
| buttons.forEach((button) => { | ||
| button.classList.remove('u-display--none'); | ||
| }); | ||
| } | ||
|
|
||
| this.CAROUSEL.setAttribute('js-testimonials-iteration', 0); | ||
|
|
||
| this.toggleVisible(show); | ||
| this.toggleHidden(hide); | ||
| } | ||
|
|
||
| addButtonListeners() { | ||
| const backButton = this.CAROUSEL.parentElement.querySelector('[js-testimonials__back]'); | ||
| const forwardButton = this.CAROUSEL.parentElement.querySelector('[js-testimonials__forward]'); | ||
|
|
||
| backButton.addEventListener('click', () => { | ||
| const current = parseInt(this.CAROUSEL.getAttribute('js-testimonials-iteration'), 10); | ||
| const amount = Math.ceil(this.IS_LARGE_SCREEN ? this.ITEMS.length /2 : this.ITEMS.length); // Desktop has half the slides | ||
| const next = current === 0 ? amount -1 : current -1; | ||
|
|
||
| this.CAROUSEL.setAttribute('js-testimonials-iteration', next); | ||
| this.updateCarousel(current) | ||
| }) | ||
|
|
||
| forwardButton.addEventListener('click', () => { | ||
| const current = parseInt(this.CAROUSEL.getAttribute('js-testimonials-iteration'), 10); | ||
| const amount = Math.ceil(this.IS_LARGE_SCREEN ? this.ITEMS.length /2 : this.ITEMS.length); // Desktop has half amount of slides as it shows two slides at a time | ||
| const next = current === amount -1 ? 0 : current +1; | ||
|
|
||
| this.CAROUSEL.setAttribute('js-testimonials-iteration', next); | ||
| this.updateCarousel(current) | ||
| }) | ||
| } | ||
|
|
||
| updateCarousel(currentIndex) { | ||
| const nextInt = parseInt(this.CAROUSEL.getAttribute('js-testimonials-iteration'), 10); | ||
|
|
||
| if(!this.IS_LARGE_SCREEN) { | ||
| this.toggleVisible([nextInt]); | ||
| this.toggleHidden([currentIndex]); | ||
| } else { | ||
| const sibling = nextInt * 2; | ||
| const currentSibling = currentIndex * 2; | ||
|
|
||
| this.toggleVisible([nextInt *2, sibling +1]); | ||
| this.toggleHidden([currentIndex *2, currentSibling +1]); | ||
| } | ||
| } | ||
|
|
||
| toggleVisible(list) { | ||
| list.forEach((i) => { | ||
| if(this.ITEMS[i] !== undefined) { | ||
| this.ITEMS[i].classList.add('c-testimonial--is-visible'); | ||
| this.ITEMS[i].classList.remove('c-testimonial--is-hidden'); | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| toggleHidden(list) { | ||
| list.forEach((i) => { | ||
| if(this.ITEMS[i] !== undefined) { | ||
| this.ITEMS[i].classList.add('c-testimonial--is-hidden'); | ||
| this.ITEMS[i].classList.remove('c-testimonial--is-visible'); | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| windowResize() { | ||
| window.addEventListener('resize', (e) => { | ||
| if(this.isLargeScreen() !== this.IS_LARGE_SCREEN) { | ||
| this.IS_LARGE_SCREEN = this.isLargeScreen(); | ||
| this.init(this.ITEMS) | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| // eslint-disable-next-line class-methods-use-this | ||
| isLargeScreen() { | ||
| const body = document.querySelector('body'); | ||
| const width = window.innerWidth / parseFloat(getComputedStyle(body)['font-size']); | ||
|
|
||
| return width >= 78; // 78em is the breakpoint for large screen | ||
| } | ||
| } |
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