ngx-carousel-ease
Version:
ngx-carousel-ease is a versatile Angular library providing a feature-rich, simple, and performant carousel component. This library supports infinite and responsive mode, mouse and touch event. Attention has been put to accessibility, performance, and frie
168 lines • 22.6 kB
JavaScript
import { signal } from '@angular/core';
export class Carousel {
constructor(carousel, maxWidthCarousel, slideToShow, slideWidth, slideMaxWidth, gap, responsive, loop) {
this.carousel = carousel;
this.maxWidthCarousel = maxWidthCarousel;
this.slideToShow = slideToShow;
this.slideWidth = slideWidth;
this.slideMaxWidth = slideMaxWidth;
this.gap = gap;
this.responsive = responsive;
this.loop = loop;
this.numberDots = signal(0);
this.maxScrollableContent = signal(0);
this.arrayNumberDots = signal([]);
this.totalSlides = 0;
this.initialSlideToShow = 1;
this.paddingCarousel = 0;
this.arrayOfSlides = [];
this.init();
}
get carouselElement() {
return this.carousel;
}
init() {
this.paddingCarousel = this.getPaddingCarousel();
this.initialSlideToShow = this.slideToShow;
this.slidesContainer = this.selectSlidesContainer();
this.slides = this.selectSlides();
this.arrayOfSlides = this.slidesToArray();
this.totalSlides = this.slides.length;
this.originalSlideWidth = this.slideWidth;
this.setWidthSlides();
this.setMaxWidthCarousel();
this.updateProperties();
this.slidesContainer.style.gap = `${this.gap}px`;
this.setDraggableImgToFalse();
}
/**
* Set the slide width and max width
* NB: In responsive mode, width is automatically adapted through the setAutoColumnSlideContainer() method.
*
*/
setWidthSlides() {
for (const slide of this.slides) {
slide.style.maxWidth = `${this.slideMaxWidth}px`;
slide.style.width = '100%';
slide.style.userSelect = 'none';
if (!this.responsive) {
slide.style.width = `${this.slideWidth}px`;
}
}
}
/**
* Update carousel properties
* Occurs at start and at resizing.
*/
updateProperties() {
this.carouselWidth = this.carousel.clientWidth;
if (this.responsive) {
this.updateSlideToShowResponsive();
this.setAutoColumnSlideContainer();
}
else {
this.updateSlideToShowNotResponsive();
}
this.numberDots.set(this.setNumberDots());
this.arrayNumberDots.set([...Array(this.numberDots()).keys()]);
this.slideWidthWithGap = this.slideWidth + this.gap;
this.setWidthSlideContainer();
this.maxScrollableContent.set(this.getMaxScroll());
}
/**
* Update slide to show (responsive mode)
* Computes the number of slide fitting
*/
updateSlideToShowResponsive() {
const slideWidthPlusGap = this.originalSlideWidth + this.gap;
const referenceWidth = Math.min(this.carouselWidth, this.maxWidthCarousel || Infinity, window.innerWidth);
const slideFitting = Math.floor(referenceWidth / slideWidthPlusGap) || 1;
this.determineSlideToShow(slideFitting);
}
/**
* Determine slide to show
* Useful to compute the slide displayed on screen and for the slider class.
* In not responsive mode, the maximum slides to show is determined by the maximum available space and the width of the slide set by the user.
*/
determineSlideToShow(slideFitting) {
const maxSlidesToShow = this.responsive
? this.initialSlideToShow
: this.totalSlides;
this.slideToShow = Math.min(slideFitting, maxSlidesToShow);
}
/**
* Update slide to show (not responsive mode)
* Computes the number of slide fitting. The number of slides to be shown are determined by the number of slides fitting within its container.
*/
updateSlideToShowNotResponsive() {
const slideWidthPlusGap = this.slideWidth + this.gap;
const referenceWidth = Math.min(this.carouselWidth, this.maxWidthCarousel || Infinity, window.innerWidth);
const numberOfSlidesComputed = Math.floor(referenceWidth / slideWidthPlusGap) || 1;
const slideFitting = Math.min(numberOfSlidesComputed, this.totalSlides);
this.determineSlideToShow(slideFitting);
}
getPaddingCarousel() {
const computedStyle = window.getComputedStyle(this.carousel);
const paddingLeft = computedStyle.getPropertyValue('padding-left');
const paddingRight = computedStyle.getPropertyValue('padding-right');
return parseFloat(paddingLeft) + parseFloat(paddingRight);
}
setMaxWidthCarousel() {
this.carousel.style.maxWidth = `${this.maxWidthCarousel}px`;
}
/**
* Set the with of a slide, responsive mode
* There are [n cards - 1] gaps (3 cards, 2 gaps)
*/
setAutoColumnSlideContainer() {
const windowWidth = this.carouselWidth -
this.paddingCarousel -
(this.slideToShow - 1) * this.gap;
const widthPerSlide = windowWidth / this.slideToShow;
this.slidesContainer.style.gridAutoColumns = `${widthPerSlide}px`;
this.slideWidth = widthPerSlide;
}
/**
* Define the slide container width
* Make non visible gaps of non visible cards scrollable and is used to compute the maxScrollableContent (strechingEffect)
*/
setWidthSlideContainer() {
this.widthSlideContainer =
this.selectSlides().length * this.slideWidthWithGap - this.gap;
this.slidesContainer.style.width = `${this.widthSlideContainer}px`;
}
selectSlides() {
return this.carousel.querySelectorAll('.carousel-slide');
}
slidesToArray() {
return Array.from(this.slides);
}
selectSlidesContainer() {
return this.carousel.querySelector('.slides-container');
}
/**
* Set number of dots
* If infinite mode, one more window than normal mode.
*/
setNumberDots() {
if (this.loop)
return this.totalSlides;
return this.slideToShow > 1
? this.totalSlides - this.slideToShow + 1
: this.totalSlides;
}
/**
* Get the max scrollable content
* Useful for the streching effect (not infinite mode), end of the slides
*/
getMaxScroll() {
return (this.numberDots() - 1) * this.slideWidthWithGap;
}
setDraggableImgToFalse() {
const images = this.slidesContainer.querySelectorAll('img');
images?.forEach((image) => {
image.setAttribute('draggable', 'false');
});
}
}
//# 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{ signal } from '@angular/core';\r\n\r\nexport class Carousel {\r\n  slides!: NodeListOf<HTMLDivElement>;\r\n  originalSlideWidth!: number;\r\n  slideWidthWithGap!: number;\r\n\r\n  numberDots = signal(0);\r\n  maxScrollableContent = signal(0);\r\n  arrayNumberDots = signal<number[]>([]);\r\n\r\n  slidesContainer!: HTMLDivElement;\r\n  totalSlides = 0;\r\n  initialSlideToShow = 1;\r\n  paddingCarousel = 0;\r\n  carouselWidth!: number;\r\n  widthSlideContainer!: number;\r\n  arrayOfSlides: HTMLDivElement[] = [];\r\n\r\n  constructor(\r\n    private readonly carousel: HTMLDivElement,\r\n    private readonly maxWidthCarousel: number | undefined,\r\n    public slideToShow: number,\r\n    public slideWidth: number,\r\n    public readonly slideMaxWidth: number,\r\n    public readonly gap: number,\r\n    private readonly responsive: boolean,\r\n    private readonly loop: boolean\r\n  ) {\r\n    this.init();\r\n  }\r\n\r\n  get carouselElement() {\r\n    return this.carousel;\r\n  }\r\n\r\n  init() {\r\n    this.paddingCarousel = this.getPaddingCarousel();\r\n    this.initialSlideToShow = this.slideToShow;\r\n    this.slidesContainer = this.selectSlidesContainer();\r\n    this.slides = this.selectSlides();\r\n    this.arrayOfSlides = this.slidesToArray();\r\n    this.totalSlides = this.slides.length;\r\n    this.originalSlideWidth = this.slideWidth;\r\n    this.setWidthSlides();\r\n    this.setMaxWidthCarousel();\r\n    this.updateProperties();\r\n    this.slidesContainer.style.gap = `${this.gap}px`;\r\n    this.setDraggableImgToFalse();\r\n  }\r\n\r\n  /**\r\n   * Set the slide width and max width\r\n   * NB: In responsive mode, width is automatically adapted through the setAutoColumnSlideContainer() method.\r\n   *\r\n   */\r\n  setWidthSlides() {\r\n    for (const slide of this.slides) {\r\n      slide.style.maxWidth = `${this.slideMaxWidth}px`;\r\n      slide.style.width = '100%';\r\n      slide.style.userSelect = 'none';\r\n\r\n      if (!this.responsive) {\r\n        slide.style.width = `${this.slideWidth}px`;\r\n      }\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Update carousel properties\r\n   * Occurs at start and at resizing.\r\n   */\r\n  updateProperties() {\r\n    this.carouselWidth = this.carousel.clientWidth;\r\n    if (this.responsive) {\r\n      this.updateSlideToShowResponsive();\r\n      this.setAutoColumnSlideContainer();\r\n    } else {\r\n      this.updateSlideToShowNotResponsive();\r\n    }\r\n\r\n    this.numberDots.set(this.setNumberDots());\r\n    this.arrayNumberDots.set([...Array(this.numberDots()).keys()]);\r\n\r\n    this.slideWidthWithGap = this.slideWidth + this.gap;\r\n    this.setWidthSlideContainer();\r\n    this.maxScrollableContent.set(this.getMaxScroll());\r\n  }\r\n\r\n  /**\r\n   * Update slide to show (responsive mode)\r\n   * Computes the number of slide fitting\r\n   */\r\n  updateSlideToShowResponsive() {\r\n    const slideWidthPlusGap = this.originalSlideWidth + this.gap;\r\n\r\n    const referenceWidth = Math.min(\r\n      this.carouselWidth,\r\n      this.maxWidthCarousel || Infinity,\r\n      window.innerWidth\r\n    );\r\n\r\n    const slideFitting = Math.floor(referenceWidth / slideWidthPlusGap) || 1;\r\n\r\n    this.determineSlideToShow(slideFitting);\r\n  }\r\n\r\n  /**\r\n   * Determine slide to show\r\n   * Useful to compute the slide displayed on screen and for the slider class.\r\n   * In not responsive mode, the maximum slides to show is determined by the maximum available space and the width of the slide set by the user.\r\n   */\r\n  determineSlideToShow(slideFitting: number) {\r\n    const maxSlidesToShow = this.responsive\r\n      ? this.initialSlideToShow\r\n      : this.totalSlides;\r\n\r\n    this.slideToShow = Math.min(slideFitting, maxSlidesToShow);\r\n  }\r\n\r\n  /**\r\n   * Update slide to show (not responsive mode)\r\n   * Computes the number of slide fitting. The number of slides to be shown are determined by the number of slides fitting within its container.\r\n   */\r\n  updateSlideToShowNotResponsive() {\r\n    const slideWidthPlusGap = this.slideWidth + this.gap;\r\n\r\n    const referenceWidth = Math.min(\r\n      this.carouselWidth,\r\n      this.maxWidthCarousel || Infinity,\r\n      window.innerWidth\r\n    );\r\n\r\n    const numberOfSlidesComputed =\r\n      Math.floor(referenceWidth / slideWidthPlusGap) || 1;\r\n    const slideFitting = Math.min(numberOfSlidesComputed, this.totalSlides);\r\n\r\n    this.determineSlideToShow(slideFitting);\r\n  }\r\n\r\n  getPaddingCarousel() {\r\n    const computedStyle = window.getComputedStyle(this.carousel);\r\n    const paddingLeft = computedStyle.getPropertyValue('padding-left');\r\n    const paddingRight = computedStyle.getPropertyValue('padding-right');\r\n\r\n    return parseFloat(paddingLeft) + parseFloat(paddingRight);\r\n  }\r\n\r\n  setMaxWidthCarousel() {\r\n    this.carousel.style.maxWidth = `${this.maxWidthCarousel}px`;\r\n  }\r\n\r\n  /**\r\n   * Set the with of a slide, responsive mode\r\n   * There are [n cards - 1] gaps (3 cards, 2 gaps)\r\n   */\r\n  setAutoColumnSlideContainer() {\r\n    const windowWidth =\r\n      this.carouselWidth -\r\n      this.paddingCarousel -\r\n      (this.slideToShow - 1) * this.gap;\r\n\r\n    const widthPerSlide = windowWidth / this.slideToShow;\r\n    this.slidesContainer.style.gridAutoColumns = `${widthPerSlide}px`;\r\n\r\n    this.slideWidth = widthPerSlide;\r\n  }\r\n\r\n  /**\r\n   * Define the slide container width\r\n   * Make non visible gaps of non visible cards scrollable and is used to compute the maxScrollableContent (strechingEffect)\r\n   */\r\n  setWidthSlideContainer() {\r\n    this.widthSlideContainer =\r\n      this.selectSlides().length * this.slideWidthWithGap - this.gap;\r\n    this.slidesContainer.style.width = `${this.widthSlideContainer}px`;\r\n  }\r\n\r\n  selectSlides(): NodeListOf<HTMLDivElement> {\r\n    return this.carousel.querySelectorAll('.carousel-slide');\r\n  }\r\n\r\n  slidesToArray() {\r\n    return Array.from(this.slides);\r\n  }\r\n\r\n  selectSlidesContainer() {\r\n    return this.carousel.querySelector('.slides-container') as HTMLDivElement;\r\n  }\r\n\r\n  /**\r\n   * Set number of dots\r\n   * If infinite mode, one more window than normal mode.\r\n   */\r\n  setNumberDots() {\r\n    if (this.loop) return this.totalSlides;\r\n\r\n    return this.slideToShow > 1\r\n      ? this.totalSlides - this.slideToShow + 1\r\n      : this.totalSlides;\r\n  }\r\n\r\n  /**\r\n   * Get the max scrollable content\r\n   * Useful for the streching effect (not infinite mode), end of the slides\r\n   */\r\n  getMaxScroll() {\r\n    return (this.numberDots() - 1) * this.slideWidthWithGap;\r\n  }\r\n\r\n  setDraggableImgToFalse() {\r\n    const images = this.slidesContainer.querySelectorAll('img');\r\n    images?.forEach((image) => {\r\n      image.setAttribute('draggable', 'false');\r\n    });\r\n  }\r\n}\r\n"]}