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An extremely useful Lorem Ipsum generator!
QUESTION
Horizontal scroll areas with buttons and gradients
Asked 2022-Apr-04 at 20:14This is my code so far:
// Show and hide gradients
$(document).ready(function() {
$(".scroll-area").each(function(index) {
if ($(this)[0].scrollWidth <= $(this)[0].clientWidth) {
$(this).closest(".container").find(".left").css("display", "none");
$(this).closest(".container").find(".right").css("display", "none");
} else {
$(this).scroll(function() {
if ($(this)[0].scrollWidth > $(this)[0].clientWidth) {
if ($(this).scrollLeft() > 0) {
$(this).closest(".container").find(".left").css("display", "block");
}
if ($(this).scrollLeft() == 0) {
$(this).closest(".container").find(".left").css("display", "none");
}
var fullWidth = $(this)[0].scrollWidth - $(this)[0].offsetWidth - 1;
if ($(this).scrollLeft() >= fullWidth) {
$(this).closest(".container").find(".right").css("display", "none");
}
if ($(this).scrollLeft() < fullWidth) {
$(this).closest(".container").find(".right").css("display", "block");
}
}
});
}
});
});
// Scroll buttons
let interval;
$('.scroll-btn').on('mousedown', ({
target
}) => {
const type = $(target).attr('id');
interval = setInterval(() => {
var x = $('#a').scrollLeft();
$('#a').scrollLeft(type === 'left-arrow' ? x - 10 : x + 10);
}, 50);
});
$('.scroll-btn').on('mouseup', () => clearInterval(interval));
* {
margin: 0;
padding: 0;
font-family: sans-serif;
font-size: 16px;
}
.container {
width: 550px;
height: 80px;
background-color: grey;
position: relative;
margin-bottom: 20px;
}
.scroll-area {
white-space: nowrap;
overflow-x: auto;
height: 100%;
}
.left,
.right {
width: 50px;
height: 100%;
position: absolute;
pointer-events: none;
top: 0;
}
.left {
background: linear-gradient(90deg, orange 0%, rgba(0, 0, 0, 0) 100%);
left: 0;
display: none;
}
.right {
background: linear-gradient(-90deg, orange 0%, rgba(0, 0, 0, 0) 100%);
right: 0;
}
.arrow {
display: block;
position: absolute;
display: flex;
align-items: center;
justify-content: center;
height: 100%;
width: 15px;
cursor: pointer;
}
.left-arrow {
left: 0;
}
.right-arrow {
right: 0;
}
.left-arrow div,
.right-arrow div {
font-size: 40px;
}
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<div class="container">
<div id="x" class="left"></div>
<div class="right"></div>
<div class="arrow left-arrow">
<div class="scroll-btn" id="left-arrow">
<</div>
</div>
<div class="arrow right-arrow">
<div class="scroll-btn" id="right-arrow">></div>
</div>
<div id="a" class="scroll-area">
<div class="text">Scroll to right. The gradients and arrows should appear and disappear based on the scroll position. It should work with more than one container. Lorem ipsum.</div>
</div>
</div>
The needs are:
Can somebody help me to do that? I would be super thankful!
ANSWER
Answered 2022-Apr-04 at 20:14You can put your arrows inside the left/right gradient div
s. That way they will show/hide same way as the gradients.
EDIT
I cleaned up the code a bit since the original answer was kinda messy. (or 'weird' as mstephen19 put it :)).
// Show gradient and left/right arrows only if scrollable
$(".scroll-area").each((i, el) => {
$(el).parent().find(".right")[el.scrollWidth > el.clientWidth ? "show" : "hide"]();
});
// Show/hide gradient and arrows on scroll
$('.scroll-area').scroll((e) => {
const fullWidth = $(e.target)[0].scrollWidth - $(e.target)[0].offsetWidth - 1;
const left = $(e.target).scrollLeft()
$(e.target).parent().find(".left, .left-arrow")[left > 0 ? "show" : "hide"]();
$(e.target).parent().find(".right, .right-arrow")[left < fullWidth ? "show" : "hide"]();
});
// Scroll on left/right arrow mouse down
let intervalId;
$(".left-arrow, .right-arrow").on("mousedown", (e) => {
const scroll = $(e.target).closest(".container").find(".scroll-area");
intervalId = setInterval(() => {
const left = scroll.scrollLeft();
scroll.scrollLeft(e.target.classList.contains("left-arrow") ? left - 10 : left + 10);
}, 50);
}).on("mouseup mouseleave", () => {
clearInterval(intervalId);
});
* {
margin: 0;
padding: 0;
font-family: sans-serif;
font-size: 16px;
}
.container {
width: 550px;
height: 80px;
background-color: grey;
position: relative;
margin-bottom: 20px;
margin-left: 20px;
}
.scroll-area {
white-space: nowrap;
overflow-x: auto;
height: 100%;
}
.left,
.right {
width: 50px;
height: 100%;
position: absolute;
top: 0;
}
.left {
background: linear-gradient(90deg, orange 0%, rgba(0, 0, 0, 0) 100%);
left: 0;
display: none;
}
.right {
background: linear-gradient(-90deg, orange 0%, rgba(0, 0, 0, 0) 100%);
right: 0;
text-align: right;
}
.left-arrow,
.right-arrow {
margin: 0 10px;
position: absolute;
top: 50%;
-ms-transform: translateY(-50%);
transform: translateY(-50%);
cursor: pointer;
user-select: none;
font-size: 40px
}
.left-arrow {
display: none;
left: -25px;
}
.right-arrow {
right: -25px;
}
<html>
<head>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<div class="container">
<div class="left"></div>
<div class="right"></div>
<div class="left-arrow"><</div>
<div class="right-arrow">></div>
<div class="scroll-area">
<div class="text">Scroll to right. The gradients and arrows should appear and disappear based on the scroll position. It should work with more than one container. Lorem ipsum.</div>
</div>
</div>
<div class="container">
<div class="left"><span class="left-arrow"><</span></div>
<div class="right"><span class="right-arrow">></span></div>
<div class="scroll-area">
<div class="text">No scroll.</div>
</div>
</div>
</body>
</html>
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