ELLIPSE ROUTE — Back to Top
A horizontal ellipse with a single contrasting accent point.
A horizontal ellipse with a single contrasting accent point.
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-2042 is-hidden" aria-label="Back to the top of the page" title="Back to Top"><span class="art a42"><svg viewBox="0 0 100 100" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><ellipse cx="50" cy="50" rx="44" ry="30" fill="none" stroke="currentColor" stroke-width="2.5"/><path d="M29 50h42" fill="none" stroke="currentColor" stroke-opacity=".2" stroke-width="1.2"/><text class="a42-word" x="50" y="57" font-family="Georgia,serif" font-size="21" fill="currentColor" text-anchor="middle" letter-spacing="2">TOP</text><circle class="a42-dot" cx="80" cy="28" r="4.3" fill="#bd8b80"/></svg></span></button>/* TB-2042 — Back to Top button. */
.tb-btt-2042{--selectedtone:#796f7a;color:#796f7a;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-2042:is(:focus-visible){outline:2px solid currentColor;outline-offset:4px}
.tb-btt-2042.is-hidden{opacity:0;transform:translateY(10px);visibility:hidden;pointer-events:none}
.tb-btt-2042 *{box-sizing:border-box}
.tb-btt-2042 .art{position:relative;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.tb-btt-2042 .art svg{display:block;width:100%;height:100%;overflow:visible}
.tb-btt-2042 .art{color:var(--selectedtone)}
.tb-btt-2042 .a42{width:112px;height:84px;color:#786b7c!important}
.tb-btt-2042 .a42 svg{width:104px;height:83px}
.tb-btt-2042 .a42-dot,.tb-btt-2042 .a42-word{transition:transform .52s cubic-bezier(.2,.8,.25,1)}
.tb-btt-2042:is(:hover,:focus-visible) .a42-dot{transform:translate(7px,8px)}
.tb-btt-2042:is(:hover,:focus-visible) .a42-word{transform:translateY(-5px)}
@media(prefers-reduced-motion:reduce){.tb-btt-2042,.tb-btt-2042 *, .tb-btt-2042 *::before,.tb-btt-2042 *::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important}}
/* TB-2042 | Back to Top | No external libraries required. */
(() => {
'use strict';
const button = document.querySelector('.tb-btt-2042');
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
Soft, modern corporate pages
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.