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Merge pull request #388 from cofacts/tutorial
Implement tutorial page
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500&display=swap" rel="stylesheet"> | ||
| <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&display=swap" rel="stylesheet"> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| module.exports = {}; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| import React, { | ||
| useRef, | ||
| useState, | ||
| useEffect, | ||
| useCallback, | ||
| forwardRef, | ||
| useImperativeHandle, | ||
| } from 'react'; | ||
| import { makeStyles } from '@material-ui/core/styles'; | ||
| import cx from 'clsx'; | ||
|
|
||
| const useStyles = makeStyles(() => ({ | ||
| slider: { | ||
| display: 'flex', | ||
| position: 'relative', | ||
| scrollSnapType: 'x mandatory', | ||
| overflowX: 'scroll', | ||
| width: '100%', | ||
| scrollbarWidth: 'none', | ||
| MsOverflowStyle: 'none', | ||
|
|
||
| '&::-webkit-scrollbar': { | ||
| display: 'none', | ||
| }, | ||
| }, | ||
| slideWrapper: { | ||
| scrollSnapAlign: 'start', | ||
| flexShrink: 0, | ||
| width: '100%', | ||
| }, | ||
| })); | ||
|
|
||
| const Slider = ( | ||
| { | ||
| className, | ||
| children, | ||
| autoplay = false, | ||
| interval = 3000, | ||
| slideWrapperClassName, | ||
| initIndex = 0, | ||
| activeIndex, | ||
| onSlideChange = () => {}, | ||
| }, | ||
| ref | ||
| ) => { | ||
| const classes = useStyles(); | ||
|
|
||
| const [activeSlide, setActiveSlide] = useState(activeIndex || initIndex); | ||
|
|
||
| const timeoutId = useRef(null); | ||
| const sliderRef = useRef(null); | ||
|
|
||
| const slides = React.Children.toArray(children); | ||
| const slidesAmount = slides.length; | ||
|
|
||
| const slideTo = useCallback( | ||
| (index, { smooth = true } = {}) => { | ||
| const slider = sliderRef.current; | ||
|
|
||
| if (slider) { | ||
| slider.scrollTo({ | ||
| left: slider.scrollWidth * (index / slidesAmount), | ||
| behavior: smooth ? 'smooth' : 'auto', | ||
| }); | ||
| } | ||
| }, | ||
| [slidesAmount] | ||
| ); | ||
|
|
||
| const autoplayNext = useCallback(() => { | ||
| if (timeoutId.current) { | ||
| clearTimeout(timeoutId.current); | ||
| timeoutId.current = null; | ||
| } | ||
|
|
||
| const id = setTimeout(() => { | ||
| const nowActiveIndex = activeIndex || activeSlide; | ||
| const nextIndex = | ||
| nowActiveIndex === slidesAmount - 1 ? 0 : nowActiveIndex + 1; | ||
|
|
||
| if (activeIndex || activeIndex === 0) { | ||
| onSlideChange(nextIndex); | ||
| } else { | ||
| slideTo(nextIndex); | ||
| } | ||
|
|
||
| if (autoplay) { | ||
| autoplayNext(); | ||
| } else { | ||
| clearTimeout(timeoutId.current); | ||
| } | ||
| }, interval); | ||
|
|
||
| timeoutId.current = id; | ||
| }, [ | ||
| slidesAmount, | ||
| activeIndex, | ||
| activeSlide, | ||
| interval, | ||
| timeoutId, | ||
| onSlideChange, | ||
| slideTo, | ||
| autoplay, | ||
| ]); | ||
|
|
||
| useImperativeHandle( | ||
| ref, | ||
| () => ({ | ||
| activeIndex: activeIndex || activeSlide, | ||
| reset: (resetIndex = 0) => { | ||
| if (activeIndex || activeIndex === 0) { | ||
| onSlideChange(resetIndex); | ||
| } else { | ||
| slideTo(resetIndex, { smooth: false }); | ||
| } | ||
|
|
||
| if (autoplay) { | ||
| autoplayNext(); | ||
| } | ||
| }, | ||
| }), | ||
| [activeIndex, activeSlide, slideTo, onSlideChange, autoplay, autoplayNext] | ||
| ); | ||
|
|
||
| useEffect(() => { | ||
| const slider = sliderRef.current; | ||
|
|
||
| const onScroll = () => { | ||
| const slider = sliderRef.current; | ||
|
|
||
| if (slider) { | ||
| const nextIndex = Math.round( | ||
| (slider.scrollLeft / slider.scrollWidth) * slidesAmount | ||
| ); | ||
|
|
||
| setActiveSlide(nextIndex); | ||
| } | ||
| }; | ||
|
|
||
| if (slider) { | ||
| slider.addEventListener('scroll', onScroll); | ||
| } | ||
|
|
||
| return () => { | ||
| if (slider) { | ||
| slider.removeEventListener('scroll', onScroll); | ||
| } | ||
| }; | ||
| }, [sliderRef, slidesAmount, activeIndex, onSlideChange]); | ||
|
|
||
| useEffect(() => { | ||
| if (autoplay) { | ||
| autoplayNext(); | ||
| } else { | ||
| clearTimeout(timeoutId.current); | ||
| } | ||
|
|
||
| return () => { | ||
| if (timeoutId.current) { | ||
| clearTimeout(timeoutId.current); | ||
| } | ||
| }; | ||
| }, [autoplay, autoplayNext, interval]); | ||
|
|
||
| useEffect(() => { | ||
| if ((activeIndex || activeIndex === 0) && activeIndex !== activeSlide) { | ||
| slideTo(activeIndex); | ||
| } | ||
|
|
||
| // eslint-disable-next-line react-hooks/exhaustive-deps | ||
| }, [activeIndex, slideTo]); | ||
|
|
||
| useEffect(() => { | ||
| onSlideChange(activeSlide); | ||
|
|
||
| // eslint-disable-next-line react-hooks/exhaustive-deps | ||
| }, [activeSlide]); | ||
|
|
||
| return ( | ||
| <div ref={sliderRef} className={cx(classes.slider, className)}> | ||
| {slides.map((slide, index) => ( | ||
| <div | ||
| key={index} | ||
| className={cx(classes.slideWrapper, slideWrapperClassName)} | ||
| > | ||
| {slide} | ||
| </div> | ||
| ))} | ||
| </div> | ||
| ); | ||
| }; | ||
|
|
||
| export default forwardRef(Slider); |
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