Source: src/Fade.ts

  1. import Flicking, { FlickingEvent, Plugin } from "@egjs/flicking";
  2. /**
  3. * You can apply fade in / out effect while panel is moving.
  4. * @ko 패널들을 움직이면서 fade in / out 효과를 부여할 수 있습니다.
  5. * @memberof eg.Flicking.plugins
  6. */
  7. class Fade implements Plugin {
  8. /**
  9. * @param - The selector of the element to which the fade effect is to be applied. If the selector is blank, it applies to panel element. <ko>Fade 효과를 적용할 대상의 선택자. 선택자가 공백이면 패널 엘리먼트에 적용된다.</ko>
  10. * @param - Effect amplication scale <ko>효과 증폭도</ko>
  11. * @example
  12. * flicking.addPlugins(new eg.Flicking.plugins.Fade("p", 1));
  13. */
  14. constructor(private selector: string = "", private scale: number = 1) {}
  15. public init(flicking: Flicking): void {
  16. flicking.on("move", this.onMove);
  17. this.move(flicking);
  18. }
  19. public update(flicking: Flicking): void {
  20. this.move(flicking);
  21. }
  22. public destroy(flicking: Flicking): void {
  23. flicking.off("move", this.onMove);
  24. }
  25. private onMove = (e: FlickingEvent): void => {
  26. this.move(e.currentTarget);
  27. }
  28. private move(flicking: Flicking): void {
  29. const panels = flicking.getVisiblePanels();
  30. const selector = this.selector;
  31. const scale = this.scale;
  32. panels.forEach(panel => {
  33. const progress = panel.getOutsetProgress();
  34. const el = panel.getElement();
  35. const target = selector ? el.querySelector<HTMLElement>(selector)! : el;
  36. const opacity = Math.min(1, Math.max(0, (1 - Math.abs(progress * scale))));
  37. target.style.opacity = `${opacity}`;
  38. });
  39. }
  40. }
  41. export default Fade;
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