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TA贡献1833条经验 获得超4个赞
对于水平滚动,我会走以下路线,简化您的 HTML 和您收听的内容。由于触摸设备只需轻扫即可轻松滚动,您所需要做的就是让有滚轮的人可以访问它。您也可以添加动画,但这会使此代码段太长。
const main = document.querySelector( 'main' );
const nav = document.querySelector( 'nav' );
let scrollend;
function onwheel(){
/* When using the scrollwheel, translate Y direction scrolls to X direction. This way scrollwheel users get the benefit of scrolling down to go right, while touch and other users get default behaviour. */
event.preventDefault();
event.stopImmediatePropagation();
main.scrollLeft += event.wheelDeltaY;
}
function onscroll(){
/* When scrolling, find the nearest element to the center of the screen. Then find the link in the nav that links to it and activate it while deactivating all others. */
const current = Array.from( main.children ).find(child => {
return child.offsetLeft >= main.scrollLeft - innerWidth / 2;
});
const link = Array.from( nav.children ).reduce((find, child) => {
child.classList.remove( 'selected' );
return find || (child.href.indexOf( current.id ) >= 0 ? child : find);
}, false);
if( link ) link.classList.add( 'selected' );
clearTimeout( scrollend );
scrollend = setTimeout( onscrollend, 100 );
}
function onscrollend(){
/* After scrolling ends, snap the appropriate element. This could be done with an animation. */
clearTimeout( scrollend );
const current = Array.from( main.children ).find(child => {
return child.offsetLeft >= main.scrollLeft - innerWidth / 2;
});
main.scrollLeft = current.offsetLeft;
}
/* Bind and initial call */
main.addEventListener( 'wheel', onwheel );
main.addEventListener( 'scroll', onscroll );
onscroll();
html,
body,
main {
height: 100%;
}
body {
padding: 0;
margin: 0;
}
main {
display: flex;
overflow: auto;
width: 100%;
height: 100%;
scroll-snap-type: x proximity;
}
main section {
width: 100%;
height: 100%;
flex: 0 0 100%;
}
nav {
position: fixed;
bottom: 0;
left: 0;
width: 100%;
display: flex;
justify-content: center;
align-items: center;
}
nav a {
width: 1em;
height: 1em;
margin: 1em;
display: block;
overflow: hidden;
color: transparent;
border: 1px solid black;
border-radius: 50%;
}
nav a.selected {
background: black;
}
.bland { background: gray; }
.dark { background: darkgray; color: white; }
.bright { background: yellow; }
<nav>
<a href="#section-1">Section 1</a>
<a href="#section-2">Section 2</a>
<a href="#section-3">Section 3</a>
</nav>
<main>
<section class="bright" id="section-1">
<h2>Section 1</h2>
</section>
<section class="dark" id="section-2">
<h2>Section 2</h2>
</section>
<section class="bland" id="section-3">
<h2>Section 3</h2>
</section>
</main>
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