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Commitbc6d4b9

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Project #20 - Create Draggable & Touchscreen Slideshow
1 parentde42a01 commitbc6d4b9

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<!DOCTYPE html>
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<htmllang="en">
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<head>
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<metacharset="UTF-8"/>
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<metaname="viewport"content="width=device-width, initial-scale=1.0"/>
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<link
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rel="stylesheet"
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href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css"
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integrity="sha512-HK5fgLBL+xu6dm/Ii3z4xhlSUyZgTT9tuc/hSrtw6uzJOvgRr2a9jyxxT1ely+B+xFAmJKVSTbpM/CuL7qxO8w=="
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crossorigin="anonymous"
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/>
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<linkrel="stylesheet"href="style.css"/>
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<title>Slideshow</title>
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</head>
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<body>
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<divclass="slider">
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<divclass="slides"id="slides">
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<spanclass="slide">
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<imgsrc="./imgs/pic1.jpg"alt=""/>
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</span>
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<spanclass="slide">
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<imgsrc="./imgs/pic2.jpg"alt=""/>
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</span>
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<spanclass="slide">
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<imgsrc="./imgs/pic3.jpg"alt=""/>
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</span>
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<spanclass="slide">
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<imgsrc="./imgs/pic4.jpg"alt=""/>
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</span>
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</div>
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<ahref="#"id="prev"class="prev">
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<iclass="fas fa-caret-left"></i>
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</a>
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<ahref="#"id="next"class="next">
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<iclass="fas fa-caret-right"></i>
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</a>
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</div>
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<scriptsrc="script.js"></script>
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</body>
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</html>
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constslides=document.getElementById("slides");
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constallSlides=document.querySelectorAll(".slide");
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constslidesLength=allSlides.length;
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constslideWidth=allSlides[0].offsetWidth;
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letindex=0;
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letposX1;
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letposX2;
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letinitialPosition;
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letfinalPosition;
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letcanISlide=true;
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constprev=document.getElementById("prev");
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constnext=document.getElementById("next");
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constfirstSlide=allSlides[0];
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constlastSlide=allSlides[allSlides.length-1];
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constcloneFirstSlide=firstSlide.cloneNode(true);
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constcloneLastSlide=lastSlide.cloneNode(true);
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slides.appendChild(cloneFirstSlide);
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slides.insertBefore(cloneLastSlide,firstSlide);
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next.addEventListener("click",()=>switchSlide("next"));
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prev.addEventListener("click",()=>switchSlide("prev"));
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slides.addEventListener("transitionend",checkIndex);
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slides.addEventListener("mousedown",dragStart);
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slides.addEventListener("touchstart",dragStart);
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slides.addEventListener("touchmove",dragMove);
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slides.addEventListener("touchend",dragEnd);
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functiondragStart(e){
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e.preventDefault();
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initialPosition=slides.offsetLeft;
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if(e.type=="touchstart"){
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posX1=e.touches[0].clientX;
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}else{
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posX1=e.clientX;
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document.onmouseup=dragEnd;
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document.onmousemove=dragMove;
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}
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}
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functiondragMove(e){
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if(e.type=="touchmove"){
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posX2=posX1-e.touches[0].clientX;
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posX1=e.touches[0].clientX;
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}else{
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posX2=posX1-e.clientX;
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posX1=e.clientX;
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}
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slides.style.left=`${slides.offsetLeft-posX2}px`;
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}
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functiondragEnd(){
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/*
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three possibilities:
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1. next slide
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2. prev slide
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3. stay still
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*/
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finalPosition=slides.offsetLeft;
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if(finalPosition-initialPosition<-496){
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switchSlide("next","dragging");
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}elseif(finalPosition-initialPosition>496){
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switchSlide("prev","dragging");
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}else{
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slides.style.left=`${initialPosition}px`;
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}
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document.onmouseup=null;
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document.onmousemove=null;
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}
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functionswitchSlide(arg,arg2){
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slides.classList.add("transition");
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if(canISlide){
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if(!arg2){
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initialPosition=slides.offsetLeft;
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}
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if(arg=="next"){
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slides.style.left=`${initialPosition-slideWidth}px`;
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index++;
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}else{
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slides.style.left=`${initialPosition+slideWidth}px`;
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index--;
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}
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}
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canISlide=false;
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}
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functioncheckIndex(){
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slides.classList.remove("transition");
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if(index==-1){
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slides.style.left=`-${slidesLength*slideWidth}px`;
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index=slidesLength-1;
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}
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if(index==slidesLength){
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slides.style.left=`-${1*slideWidth}px`;
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index=0;
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}
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canISlide=true;
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}
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* {
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box-sizing: border-box;
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}
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body {
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margin:0;
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display: flex;
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justify-content: center;
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align-items: center;
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min-height:100vh;
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}
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img {
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width:100%;
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height:100%;
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}
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.slider {
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overflow: hidden;
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position: relative;
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width:992px;
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height:768px;
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}
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.slides {
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width:10000px;
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display: flex;
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position: absolute;
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top:0;
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left:-992px;
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cursor: pointer;
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}
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.slides.transition {
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transition: all0.3s ease-in-out;
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}
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.slide {
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width:992px;
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height:768px;
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}
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.prev,
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.next {
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position: absolute;
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top:50%;
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transform:translateY(-50%);
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color:#f3f3f3;
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font-size:4rem;
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}
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.next {
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right:4rem;
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}
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.prev {
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left:4rem;
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}
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.prev:active,
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.next:active {
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color:#888;
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}

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