Когда мне удается переместить ползунок сравнения изображений, фактический «ползунок» остался позади. Код слайдера JS взят из https://www.w3schools.com/howto/howto_js_image_comparison.asp
, и его можно легко проверить, но здесь я также вставлю код. Я попытался переместить ползунок с сеткой Css, но, как упоминалось ранее, значок ползунка не будет перемещаться с изображениями.
function initComparisons() {
var x, i;
/* Find all elements with an "overlay" class: */
x = document.getElementsByClassName("img-comp-overlay");
for (i = 0; i < x.length; i++) {
/* Once for each "overlay" element:
pass the "overlay" element as a parameter when executing the compareImages function: */
compareImages(x[i]);
}
function compareImages(img) {
var slider, img, clicked = 0, w, h;
/* Get the width and height of the img element */
w = img.offsetWidth;
h = img.offsetHeight;
/* Set the width of the img element to 50%: */
img.style.width = (w / 2) + "px";
/* Create slider: */
slider = document.createElement("DIV");
slider.setAttribute("class", "img-comp-slider");
/* Insert slider */
img.parentElement.insertBefore(slider, img);
/* Position the slider in the middle: */
slider.style.top = (h / 2) - (slider.offsetHeight / 2) + "px";
slider.style.left = (w / 2) - (slider.offsetWidth / 2) + "px";
/* Execute a function when the mouse button is pressed: */
slider.addEventListener("mousedown", slideReady);
/* And another function when the mouse button is released: */
window.addEventListener("mouseup", slideFinish);
/* Or touched (for touch screens: */
slider.addEventListener("touchstart", slideReady);
/* And released (for touch screens: */
window.addEventListener("touchstop", slideFinish);
function slideReady(e) {
/* Prevent any other actions that may occur when moving over the image: */
e.preventDefault();
/* The slider is now clicked and ready to move: */
clicked = 1;
/* Execute a function when the slider is moved: */
window.addEventListener("mousemove", slideMove);
window.addEventListener("touchmove", slideMove);
}
function slideFinish() {
/* The slider is no longer clicked: */
clicked = 0;
}
function slideMove(e) {
var pos;
/* If the slider is no longer clicked, exit this function: */
if (clicked == 0) return false;
/* Get the cursor's x position: */
pos = getCursorPos(e)
/* Prevent the slider from being positioned outside the image: */
if (pos < 0) pos = 0;
if (pos > w) pos = w;
/* Execute a function that will resize the overlay image according to the cursor: */
slide(pos);
}
function getCursorPos(e) {
var a, x = 0;
e = e || window.event;
/* Get the x positions of the image: */
a = img.getBoundingClientRect();
/* Calculate the cursor's x coordinate, relative to the image: */
x = e.pageX - a.left;
/* Consider any page scrolling: */
x = x - window.pageXOffset;
return x;
}
function slide(x) {
/* Resize the image: */
img.style.width = x + "px";
/* Position the slider: */
slider.style.left = img.offsetWidth - (slider.offsetWidth / 2) + "px";
}
}
}
initComparisons();
.img-comp-container {
margin:auto;
position: relative;
height: 100vh;
width: 100vw
}
.img-comp-img {
position: absolute;
width: auto;
height: auto;
overflow:hidden;
}
.img-comp-img img {
display: block;
vertical-align: middle;
}
.img-comp-slider {
position: absolute;
z-index: 9;
cursor: ew-resize;
width: 0;
height: 0;
border-style: solid;
border-width: 9px 0 9px 14px;
border-color: transparent transparent transparent #ffffff;
}
<div class="img-comp-container">
<div class="img-comp-img">
<img src="img/ysl_before.jpg" width="650" height="450">
</div>
<div class="img-comp-img img-comp-overlay">
<img src="img/ysl_after.jpg" width="650" height="450">
</div>
</div>