- var images = ["https://lh3.googleusercontent.com/aC9nyW5dhaYFmWD8fcf8DApjpH08eHEkbCHqmUPHRQ5T3jK-QyNKZYVMehmrvyPdEA_KxWvgZ3_kyOOYOAv99Ow3UoKSvEloleVKGSfLOwOyDV3Q6Dwi1G-NYoa9-t_ofmmskE6BYnVIOnIz2HWlMcijzIEwvKAL_R4z63DaLgG0z_OcGiSQHunwGAPXrBQUv42ZXuIMODq4zxDHczSxJ72b0-_udtdQK3JuT2X8nXCwFoF7GxmOpzXS0H5f50DuCbXoXcx-O7bgBMCXZdMpTxB27-wdXeLmxpYUySXgjSN2NAKmK16DmGLYvw5tMlrqwb8h4MJEEbXjP1pjPxXsahb7UZseEGyn80uLjATANJvusyJWCtzkkxYXPz-yI1rDvfEJKe2eyA-5AvFlzFBSwBMASn8f7mXinUrXMMREkJQjoi89NfZ91G7253OEVQOqcWxddiYtcHCO5v6Pl3QfV2SUTWXgggscDSY2ezjSPpYERNTXnIM_aCyWmIG7ybrfqOB0eVYBAgynyuPVbjd4KuZWZq2Dfu33HX1RuPKglbOuZGD1QbpJnruvUVkAmjDXI40ENN7X=w1600-h766","https://lh3.googleusercontent.com/4Bn4zdADhWhegRcmxS1xmHxbxIBzEgB8ADfeaCmiwT9iF7y2mN9Wc5L7gFLxUo2bgl3V-97EFrOyE9OXfkvip3pkpNxYe50GiapeT41p7D7tNJm3oEdV8Y-7toGyvz0UZ8VgDACVTUEdzzVVm2NtQSCroSvmo4gL3u0ty-KAyKnah9vIitfw2Rs1MuNzQq6vmzUcw1_4obGAKmk_Nx0dD33RSy1jbT8D61kxERbOu0pHUciywIO2EeUX8iOcJfHHQwVW3lGYcZKSiimGjBUvzHILrSpVZQ1xUlj0U21EeY4Hil1ZaJQaX47hQezcxZj7H8GyWhNv2TzQ7EU8DS3_MonCLxXlnXfk-80nncPa8DxN_UlIzJeOPDiWPSLXFaDJn_ywCutx-0onw5rcSC815_krGHXKt3L_weD5pq_e_2WI3BRZndcR2jOYLz9BiUp52ouDBIDw2OzrDtUgxne9NaQ2tOJwaIR26N1un92ChTLhXZF2F2NoS3Do96TY6A5dP6RsXQzK6G0Z6oj5XtYx-p--PrdP8wiDPAzOqXQkXbJaX8l2qPi3nTYrD8rB-eKyL2E1q9xQ=w1600-h766","https://lh3.googleusercontent.com/r29_BOXT9GjEA49-KbPtzHtTxD16dilHpFROmoJyZdQbvCelXqgG8bcApe8OgIY-avTrFOUWO-lDsmI-muMIgRVc5IFHCIyrOR18DrnwTLh70aSNY6cTY0bNbyt4QCXBlj9R4fmA8PJMRYkTA-nB5zSvlZii9NnP9kG8w__DUrYfo9IbOZAxGY_DsheGuHA0CSWLB-lQwvHo7_sSNabsiZJ2C_878r7uEfaIR6XkjcyrWMKi529UtPl9Ikln3cXphy9HrzElIL6200dGL9GHiMMoASseLp_Z950xjT2smzTrOJSADFCG9EmScicKDbFTYZH6gyc2DEP0mUFRArhTSPa4TIUwLy9KR8bG7kV-ljmSPKv4pbtH4ByXgQ5DEm5ydOkR-DTkYkLBkcFL8cjiBPPuUdK3xkjoOciwjglMF5xAXhpnTj0VUnk3RWc9YDD-AQI2uvDatV_Ae0zzLQUIm2gfV3QiDXdkkzeLWsRmCXrr0bFf42s_1NrWD0GLfrTtHNqzBCfYbAWtjeBxHfMxlESqJLAvGketLMscx5PndptC0MRhGZESjWdRUE3kNxg7PA9EhTZg=w1600-h766","https://lh3.googleusercontent.com/7MsdX710gvwl8YRxuiPIlIbGP8d3ypDASWqIOad9SpHHAPwMATjCoftyvoHjpy9eeD8aJVxVup-Zb02QMeBSFOXyqOlVc8ib3TVIXtktozy6sJK07H8Jo8UlJSpYcfgUq83Z5rJOiGQQAaZPhRYUcCR0aenU8Eh8aTuqvttfZA-PjsU39q5_I1HcpWDF1mXIxJTmlGqsoQNIuL75GDE-I2im2tAjEk6bkJkJEbDntxB5cLJEfV8TuKRsQwenkiN5opF4ttHGXYtJlS7adu-IO4wVIFcEOzdx4c1Eri3O6f9qjsTpXQH3BmpkTaLAtL5xzJit9qa0a4Dp-aZOZp1QzWeB6-dLM5HRxSiPFkku3S1umwm_GBeY3glxd3Ftata1mFIxpis6gR76oTiNO33vjxn1UZXYhCQUDByGyyuE6WOoPtu9iXJxfmUF9UMXiXVl7qyH-U7NJmq18qcU0Q6U7H3VucD_d2Vg8WTZmqVq7aA4jQ7MLuQASgMZIerxgwV_aW98z7xsS8isHgF9rN4Qtez18OjyabQxRXlC6shvRTqTDCpt1MPlfBWwyR2BKO3dHzk7h8T5=w1600-h766","https://lh3.googleusercontent.com/lqd5x1eNHsfzWpPeHNPe4u-ycQh1LyxWLp_mXi8tLvQGh4aNCbANfSfSWQdqhQy7c2J2V3a4dGIw6tRcMJCpFvsRrLLpXcFgHIjWpCWoxtgWC--0tMjb6W-YYKJX55zIhS1omxmSGPuQx1sZtsAL-XnRiqXbEIjGX1A_vbDObqVEc8TP3nVsraN5xLtektJbccNriwqqZ2CqpiuHagXKCRt3oa7D8N2ZygR-i04o8YP2pHr6I0Z76R6lZj1HDY65Sj-mkPJpN6nWKY-V_6htmMndJRY615MHntdsfZ82k5_IBbJXxdIN5MjJvgk41eyFXxzTKIXSGms-itEbW7FqMlZT8bIAigDoXYub9rh-FjtfdmVRVdwIIngzFzJrJQBroyHPxW9kW2JjH8foZCzX5YMStsHvfm1s4uAhZtbwK4KI_-x9GuXI3-cCUmtuFdQ-E2z_l3Hom57dasvYj6tFcqhRS9X_popdYTxR-4IeSE-NAjp71LDevvejtAqQTvpIRMFhV9um8qOb-xkPRe0xSoR6-chA2cQE--cbFJiLxe6ywBIqW6lI-aSI9Kv924s-OfRUGz0u=w1600-h766"];
- var text = {Forest: '“And into the forest I go, to lose my mind and find my soul”', Lake: '“Mist to mist, drops to drops. For water thou art, and unto water shalt thou return”', Cliffs: '“Go to the edge of the cliff and jump off. Build your wings on the way down”', Mountains: '“What are men to rocks and mountains?”', Peaks: '“On all the peaks lies peace”'};
#slider.slider(style="--img-prev:url(" + images[0] + ");")
#slider-content.slider__content
.slider__images
each val, i in images
- var imgClassName = 'slider__images-item';
if i+1 === 1
- imgClassName += ' slider__images-item--active';
div(class=imgClassName data-id=i+1)
img(src=val)
.slider__text
- var i = 0;
each val, key in text
- var textClassName = 'slider__text-item';
if ++i === 1
- textClassName += ' slider__text-item--active';
div(class=textClassName data-id=i)
.slider__text-item-head
h3= key
.slider__text-item-info
p= val
.slider__nav
.slider__nav-arrows
#left.slider__nav-arrow.slider__nav-arrow--left to left
#right.slider__nav-arrow.slider__nav-arrow--right to right
#slider-dots.slider__nav-dots
- var i = 0;
while i++ < images.length
- var dotsClassName = 'slider__nav-dot';
if i === 1
- dotsClassName += ' slider__nav-dot--active';
div(class=dotsClassName data-id=i)
/*
Note: the original SCSS code below was commented out due to some bug in
Codepen's SCSS parser (the code itself is perfectly valid), so I temporarily
pasted the compiled CSS for the demo to work.
*/
/*
@import url('https://fonts.googleapis.com/css?family=Lora:700');
@import url('https://fonts.googleapis.com/css?family=Open+Sans');
$item-width: 65vw;
$transition-time: .7s;
$transition-text-time: $transition-time / 2;
$offset: 1em;
$mobile-bkp: 650px;
:root {
--z-distance: $item-width / 7.63;
--from-left: 1;
--mobile-bkp: $mobile-bkp;
}
*, *::before, *::after {
box-sizing: border-box;
}
body {
min-height: 100vh;
margin: 0;
padding: 0;
overflow: hidden;
font-family: Lora, serif;
font-size: calc(14px + .3vw);
}
.slider {
width: 100vw;
height: 100vh;
display: flex;
perspective: 1000px;
transform-style: preserve-3d;
&::before, &::after {
content: '';
left: -1vw;
top: -1vh;
display: block;
position: absolute;
width: 102vw;
height: 102vh;
background-position: center;
background-size: cover;
will-change: opacity;
// filter: blur(.2em);
z-index: -1;
box-shadow: 0 0 0 50vmax hsla(0, 50%, 0, .7) inset;
}
&::before {
background-image: var(--img-prev);
}
&::after {
transition: opacity $transition-time;
opacity: 0;
background-image: var(--img-next);
}
&--bg-next::after {
opacity: 1;
}
&__content {
margin: auto;
width: $item-width;
height: $item-width / 2;
max-height: 60vh;
will-change: transform;
transform-style: preserve-3d;
pointer-events: none;
transform: translateZ(var(--z-distance));
}
&__images {
overflow: hidden;
position: absolute;
width: 100%;
height: 100%;
z-index: 0;
box-shadow: 0 0 5em #000;
&-item {
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
will-change: transform;
transition-timing-function: ease-in;
visibility: hidden;
img {
display: block;
position: relative;
left: -$offset;
top: -$offset;
width: calc(100% + #{$offset} * 2);
height: calc(100% + #{$offset} * 2);
object-fit: cover;
will-change: transform;
}
}
&-item--active {
z-index: 20;
visibility: visible;
}
&-item--subactive {
z-index: 15;
visibility: visible;
}
&-item--next {
transform: translateX(100%);
}
&-item--prev {
transform: translateX(-100%);
}
&-item--transit {
transition: transform $transition-time, opacity $transition-time;
}
}
&__text {
position: relative;
height: 100%;
&-item {
position: absolute;
width: 100%;
height: 100%;
padding: 0.5em;
perspective: 1000px;
transform-style: preserve-3d;
> * {
overflow: hidden;
position: absolute;
}
h3, & p {
transition: transform $transition-text-time ease-out;
line-height: 1.5;
overflow: hidden;
}
h3 {
background-color: hsla(0, 50%, 100%, 0.5);
}
p {
font-family: 'Open Sans', sans-serif;
padding: 1em;
color: white;
text-align: center;
background-color: hsla(0, 0%, 0%, 0.5);
}
h3::before, & p::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 105%;
height: 100%;
transform: translateX(0);
transition: transform
$transition-text-time
ease-out
$transition-text-time * .8;
}
h3::before {
background-color: #000;
}
p::before {
background-color: #fff;
}
h3 {
margin: 0;
font-size: 3.5em;
padding: 0 .3em;
position: relative;
font-weight: 700;
transform: translateX(-100%);
}
p {
margin: 0;
transform: translateX(100%);
}
}
&-item-head {
top: -0.5em;
transform: translateZ(3em);
clip-path: polygon(0 0, .5em 100%, 100% 100%, calc(100% - .3em) .3em);
}
&-item-info {
bottom: 0;
right: 0;
max-width: 75%;
min-width: min-content;
transform: translateZ(2em);
clip-path: polygon(0.5em 0, 100% 0%, calc(100% - .5em) 100%, 0 calc(100% - .5em));
}
&-item--active {
h3, & p {
transform: translateX(0);
}
h3::before {
transform: translateX(100%);
}
p::before {
transform: translateX(-100%);
}
}
&-item--backwards {
h3::before, p::before {
transition: transform $transition-text-time ease-in;
}
h3, p {
transition: transform $transition-text-time ease-in $transition-text-time;
}
}
}
&__nav {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
text-align: center;
$arrow-size: 5vw;
&-arrows {
display: flex;
justify-content: space-between;
width: 100%;
position: absolute;
top: 0;
left: 0;
}
&-arrow {
height: 100vh;
width: 50vw;
text-indent: -9999px;
white-space: nowrap;
&--left {
--arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 4 4'%3E %3Cpolyline points='3 1 1 2 3 3' stroke='white' stroke-width='.3' stroke-opacity='.5' fill='none'%3E%3C/polyline%3E %3C/svg%3E");
cursor: var(--arrow) 40 40, auto;
}
&--right {
--arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 4 4'%3E %3Cpolyline points='1 1 3 2 1 3' stroke='white' stroke-width='.3' stroke-opacity='.5' fill='none'%3E%3C/polyline%3E %3C/svg%3E");
cursor: var(--arrow) 40 40, auto;
}
}
$dot-clr: hsla(0, 50%, 100%, .5);
$dot-size: 1em;
$dot-border: 2px;
&-dots {
$pad: 1em;
margin-top: 88vh;
display: inline-flex;
position: relative;
padding: $pad;
pointer-events: none;
&::before {
content: '';
position: absolute;
left: calc(#{$pad} + #{$dot-size} + #{$dot-border});
top: calc(#{$pad} + #{$dot-border});
width: calc(#{$dot-size} - #{$dot-border} * 2);
height: calc(#{$dot-size} / 2 - #{$dot-border} * 2);
background-color: hsla(0, 50%, 100%, .9);
transition: transform $transition-time ease-out;
transform: translateX(calc((#{$dot-size} + #{$pad} * 2) * (var(--from-left) - 1)));
}
}
&-dot {
margin: 0 $dot-size;
width: $dot-size;
height: $dot-size / 2;
border: $dot-border solid $dot-clr;
// The cursor is not the default one because of a weird bug
// related to custom cursors above
cursor: crosshair;
pointer-events: all;
display: inline-block;
&:hover {
border-color: hsla(0, 50%, 100%, .7);
}
&:active {
border-color: $dot-clr;
}
}
}
}
@media only screen and (max-width: $mobile-bkp) {
.slider::before,
.slider::after {
display: none;
}
.slider__content {
width: 100vw;
height: 100vh;
max-height: 100vh;
}
.slider__text-item-info {
bottom: 50%;
left: 50%;
transform: translate(-50%, 50%);
p {
padding: 1em .8em;
}
}
.slider__text-item-head {
top: 5vh;
left: 10vw;
transform: translateZ(0);
h3 {
font-size: 2.5em;
}
}
.slider__nav-dots {
background-color: hsla(0,50%,0%,.3);
}
.slider__nav-arrow {
width: 10vw;
position: relative;
cursor: auto;
&:active {
filter: brightness(.5);
}
&::before {
content: '';
background-image: var(--arrow);
background-size: cover;
width: 8vw;
height: 8vw;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
&--left {
background-image: linear-gradient(to right, hsla(0,50%,0%,.7) 0, transparent 100%);
&:active {
background-image: linear-gradient(to right, hsla(0,50%,0%,.9) 0, transparent 100%);
}
}
&--right {
background-image: linear-gradient(to left, hsla(0,50%,0%,.7) 0, transparent 100%);
&:active {
background-image: linear-gradient(to left, hsla(0,50%,0%,.9) 0, transparent 100%);
}
}
}
}
*/
@import url("https://fonts.googleapis.com/css?family=Lora:700");
@import url("https://fonts.googleapis.com/css?family=Open+Sans");
:root {
--z-distance: 8.519vw;
--from-left: 1;
--mobile-bkp: 650px;
}
*, *::before, *::after {
box-sizing: border-box;
}
body {
min-height: 100vh;
margin: 0;
padding: 0;
overflow: hidden;
font-family: Lora, serif;
font-size: calc(14px + .3vw);
}
.slider {
width: 100vw;
height: 100vh;
display: flex;
perspective: 1000px;
transform-style: preserve-3d;
}
.slider::before, .slider::after {
content: '';
left: -1vw;
top: -1vh;
display: block;
position: absolute;
width: 102vw;
height: 102vh;
background-position: center;
background-size: cover;
will-change: opacity;
z-index: -1;
box-shadow: 0 0 0 50vmax rgba(0, 0, 0, 0.7) inset;
}
.slider::before {
background-image: var(--img-prev);
}
.slider::after {
transition: opacity 0.7s;
opacity: 0;
background-image: var(--img-next);
}
.slider--bg-next::after {
opacity: 1;
}
.slider__content {
margin: auto;
width: 65vw;
height: 32.5vw;
max-height: 60vh;
will-change: transform;
transform-style: preserve-3d;
pointer-events: none;
transform: translateZ(var(--z-distance));
}
.slider__images {
overflow: hidden;
position: absolute;
width: 100%;
height: 100%;
z-index: 0;
box-shadow: 0 0 5em #000;
}
.slider__images-item {
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
will-change: transform;
transition-timing-function: ease-in;
visibility: hidden;
}
.slider__images-item img {
display: block;
position: relative;
left: -1em;
top: -1em;
width: calc(100% + 1em * 2);
height: calc(100% + 1em * 2);
object-fit: cover;
will-change: transform;
}
.slider__images-item--active {
z-index: 20;
visibility: visible;
}
.slider__images-item--subactive {
z-index: 15;
visibility: visible;
}
.slider__images-item--next {
transform: translateX(100%);
}
.slider__images-item--prev {
transform: translateX(-100%);
}
.slider__images-item--transit {
transition: transform 0.7s, opacity 0.7s;
}
.slider__text {
position: relative;
height: 100%;
}
.slider__text-item {
position: absolute;
width: 100%;
height: 100%;
padding: 0.5em;
perspective: 1000px;
transform-style: preserve-3d;
}
.slider__text-item > * {
overflow: hidden;
position: absolute;
}
.slider__text-item h3, .slider__text-item p {
transition: transform 0.35s ease-out;
line-height: 1.5;
overflow: hidden;
}
.slider__text-item h3 {
background-color: rgba(255, 255, 255, 0.5);
}
.slider__text-item p {
font-family: 'Open Sans', sans-serif;
padding: 1em;
color: white;
text-align: center;
background-color: rgba(0, 0, 0, 0.5);
}
.slider__text-item h3::before, .slider__text-item p::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 105%;
height: 100%;
transform: translateX(0);
transition: transform 0.35s ease-out 0.28s;
}
.slider__text-item h3::before {
background-color: #000;
}
.slider__text-item p::before {
background-color: #fff;
}
.slider__text-item h3 {
margin: 0;
font-size: 3.5em;
padding: 0 .3em;
position: relative;
font-weight: 700;
transform: translateX(-100%);
}
.slider__text-item p {
margin: 0;
transform: translateX(100%);
}
.slider__text-item-head {
top: -0.5em;
transform: translateZ(3em);
}
.slider__text-item-info {
bottom: 0;
right: 0;
max-width: 75%;
min-width: min-content;
transform: translateZ(2em);
}
.slider__text-item--active h3, .slider__text-item--active p {
transform: translateX(0);
}
.slider__text-item--active h3::before {
transform: translateX(102%);
}
.slider__text-item--active p::before {
transform: translateX(-102%);
}
.slider__text-item--backwards h3::before, .slider__text-item--backwards p::before {
transition: transform 0.35s ease-in;
}
.slider__text-item--backwards h3, .slider__text-item--backwards p {
transition: transform 0.35s ease-in 0.35s;
}
.slider__nav {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
text-align: center;
}
.slider__nav-arrows {
display: flex;
justify-content: space-between;
width: 100%;
position: absolute;
top: 0;
left: 0;
}
.slider__nav-arrow {
height: 100vh;
width: 50vw;
text-indent: -9999px;
white-space: nowrap;
}
.slider__nav-arrow--left {
--arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 4 4'%3E %3Cpolyline points='3 1 1 2 3 3' stroke='white' stroke-width='.3' stroke-opacity='.5' fill='none'%3E%3C/polyline%3E %3C/svg%3E");
cursor: var(--arrow) 40 40, auto;
}
.slider__nav-arrow--right {
--arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 4 4'%3E %3Cpolyline points='1 1 3 2 1 3' stroke='white' stroke-width='.3' stroke-opacity='.5' fill='none'%3E%3C/polyline%3E %3C/svg%3E");
cursor: var(--arrow) 40 40, auto;
}
.slider__nav-dots {
margin-top: 88vh;
display: inline-flex;
position: relative;
padding: 1em;
pointer-events: none;
}
.slider__nav-dots::before {
content: '';
position: absolute;
left: calc(1em + 1em + 2px);
top: calc(1em + 2px);
width: calc(1em - 2px * 2);
height: calc(1em / 2 - 2px * 2);
background-color: rgba(255, 255, 255, 0.9);
transition: transform 0.7s ease-out;
transform: translateX(calc((1em + 1em * 2) * (var(--from-left) - 1)));
}
.slider__nav-dot {
margin: 0 1em;
width: 1em;
height: 0.5em;
border: 2px solid rgba(255, 255, 255, 0.5);
cursor: crosshair;
pointer-events: all;
display: inline-block;
}
.slider__nav-dot:hover {
border-color: rgba(255, 255, 255, 0.7);
}
.slider__nav-dot:active {
border-color: rgba(255, 255, 255, 0.5);
}
@media only screen and (max-width: 650px) {
.slider::before,
.slider::after {
display: none;
}
.slider__content {
width: 100vw;
height: 100vh;
max-height: 100vh;
}
.slider__text-item-info {
bottom: 50%;
left: 50%;
transform: translate(-50%, 50%);
}
.slider__text-item-info p {
padding: 1em .8em;
}
.slider__text-item-head {
top: 5vh;
left: 10vw;
transform: translateZ(0);
}
.slider__text-item-head h3 {
font-size: 2.5em;
}
.slider__nav-dots {
background-color: rgba(0, 0, 0, 0.3);
}
.slider__nav-arrow {
width: 10vw;
position: relative;
cursor: auto;
}
.slider__nav-arrow:active {
filter: brightness(0.5);
}
.slider__nav-arrow::before {
content: '';
background-image: var(--arrow);
background-size: cover;
width: 8vw;
height: 8vw;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.slider__nav-arrow--left {
background-image: linear-gradient(to right, rgba(0, 0, 0, 0.7) 0, transparent 100%);
}
.slider__nav-arrow--left:active {
background-image: linear-gradient(to right, rgba(0, 0, 0, 0.9) 0, transparent 100%);
}
.slider__nav-arrow--right {
background-image: linear-gradient(to left, rgba(0, 0, 0, 0.7) 0, transparent 100%);
}
.slider__nav-arrow--right:active {
background-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0, transparent 100%);
}
}
/*
More about this function -
https://codepen.io/rachsmith/post/animation-tip-lerp
*/
function lerp({ x, y }, { x: targetX, y: targetY }) {
const fraction = 0.1;
x += (targetX - x) * fraction;
y += (targetY - y) * fraction;
return { x, y };
}
class Slider {
constructor (el) {
const imgClass = this.IMG_CLASS = 'slider__images-item';
const textClass = this.TEXT_CLASS = 'slider__text-item';
const activeImgClass = this.ACTIVE_IMG_CLASS = `${imgClass}--active`;
const activeTextClass = this.ACTIVE_TEXT_CLASS = `${textClass}--active`;
this.el = el;
this.contentEl = document.getElementById('slider-content');
this.onMouseMove = this.onMouseMove.bind(this);
// taking advantage of the live nature of 'getElement...' methods
this.activeImg = el.getElementsByClassName(activeImgClass);
this.activeText = el.getElementsByClassName(activeTextClass);
this.images = el.getElementsByTagName('img');
document.getElementById('slider-dots')
.addEventListener('click', this.onDotClick.bind(this));
document.getElementById('left')
.addEventListener('click', this.prev.bind(this));
document.getElementById('right')
.addEventListener('click', this.next.bind(this));
window.addEventListener('resize', this.onResize.bind(this));
this.onResize();
this.length = this.images.length;
this.lastX = this.lastY = this.targetX = this.targetY = 0;
}
onResize () {
const htmlStyles = getComputedStyle(document.documentElement);
const mobileBreakpoint = htmlStyles.getPropertyValue('--mobile-bkp');
const isMobile = this.isMobile = matchMedia(
`only screen and (max-width: ${mobileBreakpoint})`
).matches;
this.halfWidth = innerWidth / 2;
this.halfHeight = innerHeight / 2;
this.zDistance = htmlStyles.getPropertyValue('--z-distance');
if (!isMobile && !this.mouseWatched) {
this.mouseWatched = true;
this.el.addEventListener('mousemove', this.onMouseMove);
this.el.style.setProperty(
'--img-prev',
`url(${this.images[+this.activeImg[0].dataset.id - 1].src})`
);
this.contentEl.style.setProperty('transform', `translateZ(${this.zDistance})`);
} else if (isMobile && this.mouseWatched) {
this.mouseWatched = false;
this.el.removeEventListener('mousemove', this.onMouseMove);
this.contentEl.style.setProperty('transform', 'none');
}
}
getMouseCoefficients ({ pageX, pageY } = {}) {
const halfWidth = this.halfWidth;
const halfHeight = this.halfHeight;
const xCoeff = ((pageX || this.targetX) - halfWidth) / halfWidth;
const yCoeff = (halfHeight - (pageY || this.targetY)) / halfHeight;
return { xCoeff, yCoeff }
}
onMouseMove ({ pageX, pageY }) {
this.targetX = pageX;
this.targetY = pageY;
if (!this.animationRunning) {
this.animationRunning = true;
this.runAnimation();
}
}
runAnimation () {
if (this.animationStopped) {
this.animationRunning = false;
return;
}
const maxX = 10;
const maxY = 10;
const newPos = lerp({
x: this.lastX,
y: this.lastY
}, {
x: this.targetX,
y: this.targetY
});
const { xCoeff, yCoeff } = this.getMouseCoefficients({
pageX: newPos.x,
pageY: newPos.y
});
this.lastX = newPos.x;
this.lastY = newPos.y;
this.positionImage({ xCoeff, yCoeff });
this.contentEl.style.setProperty('transform', `
translateZ(${this.zDistance})
rotateX(${maxY * yCoeff}deg)
rotateY(${maxX * xCoeff}deg)
`);
if (this.reachedFinalPoint) {
this.animationRunning = false;
} else {
requestAnimationFrame(this.runAnimation.bind(this));
}
}
get reachedFinalPoint () {
const lastX = ~~this.lastX;
const lastY = ~~this.lastY;
const targetX = this.targetX;
const targetY = this.targetY;
return (lastX == targetX || lastX - 1 == targetX || lastX + 1 == targetX)
&& (lastY == targetY || lastY - 1 == targetY || lastY + 1 == targetY);
}
positionImage ({ xCoeff, yCoeff }) {
const maxImgOffset = 1;
const currentImage = this.activeImg[0].children[0];
currentImage.style.setProperty('transform', `
translateX(${maxImgOffset * -xCoeff}em)
translateY(${maxImgOffset * yCoeff}em)
`);
}
onDotClick ({ target }) {
if (this.inTransit) return;
const dot = target.closest('.slider__nav-dot');
if (!dot) return;
const nextId = dot.dataset.id;
const currentId = this.activeImg[0].dataset.id;
if (currentId == nextId) return;
this.startTransition(nextId);
}
transitionItem (nextId) {
function onImageTransitionEnd (e) {
e.stopPropagation();
nextImg.classList.remove(transitClass);
self.inTransit = false;
this.className = imgClass;
this.removeEventListener('transitionend', onImageTransitionEnd);
}
const self = this;
const el = this.el;
const currentImg = this.activeImg[0];
const currentId = currentImg.dataset.id;
const imgClass = this.IMG_CLASS;
const textClass = this.TEXT_CLASS;
const activeImgClass = this.ACTIVE_IMG_CLASS;
const activeTextClass = this.ACTIVE_TEXT_CLASS;
const subActiveClass = `${imgClass}--subactive`;
const transitClass = `${imgClass}--transit`;
const nextImg = el.querySelector(`.${imgClass}[data-id='${nextId}']`);
const nextText = el.querySelector(`.${textClass}[data-id='${nextId}']`);
let outClass = '';
let inClass = '';
this.animationStopped = true;
nextText.classList.add(activeTextClass);
el.style.setProperty('--from-left', nextId);
currentImg.classList.remove(activeImgClass);
currentImg.classList.add(subActiveClass);
if (currentId < nextId) {
outClass = `${imgClass}--next`;
inClass = `${imgClass}--prev`;
} else {
outClass = `${imgClass}--prev`;
inClass = `${imgClass}--next`;
}
nextImg.classList.add(outClass);
requestAnimationFrame(() => {
nextImg.classList.add(transitClass, activeImgClass);
nextImg.classList.remove(outClass);
this.animationStopped = false;
this.positionImage(this.getMouseCoefficients());
currentImg.classList.add(transitClass, inClass);
currentImg.addEventListener('transitionend', onImageTransitionEnd);
});
if (!this.isMobile)
this.switchBackgroundImage(nextId);
}
startTransition (nextId) {
function onTextTransitionEnd(e) {
if (!e.pseudoElement) {
e.stopPropagation();
requestAnimationFrame(() => {
self.transitionItem(nextId);
});
this.removeEventListener('transitionend', onTextTransitionEnd);
}
}
if (this.inTransit) return;
const activeText = this.activeText[0];
const backwardsClass = `${this.TEXT_CLASS}--backwards`;
const self = this;
this.inTransit = true;
activeText.classList.add(backwardsClass);
activeText.classList.remove(this.ACTIVE_TEXT_CLASS);
activeText.addEventListener('transitionend', onTextTransitionEnd);
requestAnimationFrame(() => {
activeText.classList.remove(backwardsClass);
});
}
next () {
if (this.inTransit) return;
let nextId = +this.activeImg[0].dataset.id + 1;
if (nextId > this.length)
nextId = 1;
this.startTransition(nextId);
}
prev () {
if (this.inTransit) return;
let nextId = +this.activeImg[0].dataset.id - 1;
if (nextId < 1)
nextId = this.length;
this.startTransition(nextId);
}
switchBackgroundImage (nextId) {
function onBackgroundTransitionEnd (e) {
if (e.target === this) {
this.style.setProperty('--img-prev', imageUrl);
this.classList.remove(bgClass);
this.removeEventListener('transitionend', onBackgroundTransitionEnd);
}
}
const bgClass = 'slider--bg-next';
const el = this.el;
const imageUrl = `url(${this.images[+nextId - 1].src})`;
el.style.setProperty('--img-next', imageUrl);
el.addEventListener('transitionend', onBackgroundTransitionEnd);
el.classList.add(bgClass);
}
}
const sliderEl = document.getElementById('slider');
const slider = new Slider(sliderEl);
// ------------------ Demo stuff ------------------------ //
let timer = 0;
function autoSlide () {
requestAnimationFrame(() => {
slider.next();
});
timer = setTimeout(autoSlide, 5000);
}
function stopAutoSlide () {
clearTimeout(timer);
this.removeEventListener('touchstart', stopAutoSlide);
this.removeEventListener('mousemove', stopAutoSlide);
}
sliderEl.addEventListener('mousemove', stopAutoSlide);
sliderEl.addEventListener('touchstart', stopAutoSlide);
timer = setTimeout(autoSlide, 2000);
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