DOUBLE LIFT — Back to Top
Two stacked chevrons in a compact rounded control.
Two stacked chevrons in a compact rounded control.
Design Preview
See the design above before trying the scroll interaction.
Live Demo
Press Try scrolling in the frame, or scroll inside it. Click the lower-right button to return to the top.
Source Code
Copy the HTML, CSS or JavaScript you need for your project.
<button type="button" class="tb-btt-button tb-btt-2019 is-hidden" aria-label="Back to the top of the page" title="Back to Top"><span class="art a19"><span class="a19-arrows"><i></i><i></i></span><span class="a19-label">TOP</span></span></button>/* TB-2019 — Back to Top button. */
.tb-btt-2019{--selectedtone:#52616e;color:#52616e;position:fixed;right:max(18px,env(safe-area-inset-right));bottom:max(18px,env(safe-area-inset-bottom));z-index:1000;border:0;background:transparent;padding:5px;display:flex;align-items:center;justify-content:center;min-width:48px;min-height:48px;cursor:pointer;font-family:Arial,"Noto Sans JP",sans-serif;line-height:normal;box-sizing:border-box;-webkit-tap-highlight-color:transparent;transition:opacity .24s ease, transform .35s ease,visibility .24s ease}
.tb-btt-2019:is(:focus-visible){outline:2px solid currentColor;outline-offset:4px}
.tb-btt-2019.is-hidden{opacity:0;transform:translateY(10px);visibility:hidden;pointer-events:none}
.tb-btt-2019 *{box-sizing:border-box}
.tb-btt-2019 .art{position:relative;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.tb-btt-2019 .art{color:var(--selectedtone)}
.tb-btt-2019 .a19{width:69px;height:76px;border-radius:12px;border:1.5px solid #596d80;background:#f5f7f8;flex-direction:column;gap:4px;color:#42566a!important;transition:background .35s}
.tb-btt-2019 .a19-arrows{position:relative;height:34px;width:29px;display:flex;flex-direction:column;align-items:center;gap:0;justify-content:center;overflow:hidden}
.tb-btt-2019 .a19-arrows i{width:17px;height:17px;border-top:3px solid currentColor;border-left:3px solid currentColor;transform:rotate(45deg) translate(3px,3px);display:block;flex:none;transition:transform .55s cubic-bezier(.2,.8,.2,1)}
.tb-btt-2019 .a19-arrows i+ i{opacity:.55}
.tb-btt-2019 .a19-label{font:700 9px Arial,sans-serif;letter-spacing:2.8px}
.tb-btt-2019:is(:hover,:focus-visible) .a19-arrows i:first-child{transform:rotate(45deg) translate(-3px,-3px)}
.tb-btt-2019:is(:hover,:focus-visible) .a19-arrows i:last-child{transform:rotate(45deg) translate(-1px,-1px);transition-delay:.08s}
@media(prefers-reduced-motion:reduce){.tb-btt-2019,.tb-btt-2019 *, .tb-btt-2019 *::before,.tb-btt-2019 *::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important}}
/* TB-2019 | Back to Top | No external libraries required. */
(() => {
'use strict';
const button = document.querySelector('.tb-btt-2019');
if (!button) return;
const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)');
let scheduled = false;
function update() {
scheduled = false;
const visible = window.scrollY > 160;
button.classList.toggle('is-hidden', !visible);
button.tabIndex = visible ? 0 : -1;
button.setAttribute('aria-hidden', String(!visible));
}
function requestUpdate() {
if (scheduled) return;
scheduled = true;
requestAnimationFrame(update);
}
button.addEventListener('click', () => {
window.scrollTo({ top: 0, behavior: reduceMotion.matches ? 'auto' : 'smooth' });
});
window.addEventListener('scroll', requestUpdate, { passive: true });
window.addEventListener('resize', requestUpdate, { passive: true });
update();
})();
How to Use
Insert the HTML button near the end of body, load CSS and JavaScript (defer), then verify scrolling and return-to-top on desktop and mobile.
Use Case
General navigation and utility interfaces
Technical Notes
Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.
Mobile: Works with tap and keyboard. Check the lower-right offset against other fixed controls.
Browser: Uses standard HTML, CSS and JavaScript. Install all three together; no external library is required.
Reduced Motion: Reduces transitions and smooth scrolling when reduced motion is requested.