First Frame — Return to First Frame

Source Code

Copy the HTML, CSS or JavaScript you need for your project.

<button aria-label="最初の写真へ、ページの先頭に戻る" class="btt-control btt-2090 btt-hidden" data-btt="" type="button"><span aria-hidden="true" class="frame-perfs">▣ ▣ ▣</span><span aria-hidden="true" class="frame-pics"><i></i><i></i><i></i></span><span class="frame-text"><b>FIRST FRAME</b><small>BACK TO START</small></span><span class="frame-count" data-state="">02 / 04</span></button>

 .btt-control{box-sizing:border-box;appearance:none;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent}.btt-control:focus-visible{outline:3px solid #e6a643;outline-offset:5px}.btt-hidden{opacity:0;visibility:hidden;pointer-events:none}.btt-visible{opacity:1;visibility:visible;pointer-events:auto} @media(prefers-reduced-motion:reduce){.btt-control,.btt-control *{animation-duration:.01ms!important;transition-duration:.01ms!important}}
 .btt-2090{position:fixed;left:clamp(15px,3vw,46px);bottom:25px;z-index:40;width:186px;min-height:132px;background:#171e24;color:#fff5e8;padding:10px 12px;border:1px solid #d0c4b8;box-shadow:0 15px 28px #07131c65;opacity:0;transform:translateY(20px);transition:opacity .3s,transform .3s,visibility .3s}.btt-2090.btt-visible{opacity:1;transform:none}.frame-perfs{display:block;letter-spacing:14px;white-space:nowrap;font-size:8px;color:#aeaa9d;line-height:1}.frame-pics{display:flex;gap:5px;padding:8px 0}.frame-pics i{width:46px;height:35px;flex:none;background:linear-gradient(135deg,#dbb6a4,#455c66 62%);border:2px solid #fff9ea;transition:transform .25s}.frame-pics i:nth-child(2){background:linear-gradient(45deg,#748b7c,#e3d1ab 52%,#496276)}.frame-pics i:nth-child(3){background:linear-gradient(145deg,#77909d,#d4c3b8 45%,#293b50)}.frame-text{display:flex;align-items:center;justify-content:space-between;gap:8px}.frame-text b{font:700 12px/1.3 Arial;letter-spacing:.07em}.frame-text small{font:700 9px/1.25 Arial;letter-spacing:.05em}.frame-count{display:block;text-align:right;color:#cbbba7;font:700 9px/1.3 monospace;margin-top:5px}.btt-2090:hover{transform:translateY(-7px)}.btt-2090:hover .frame-pics i:first-child{transform:translateY(-4px)}@media(max-width:600px){.btt-2090{left:12px;bottom:18px;width:163px;padding:8px 10px;min-height:123px}.frame-pics i{width:39px;height:32px}.frame-text b{font-size:11px}.frame-text small{font-size:8px}}
/* Field QA / positioning and responsive readability */
@media(max-width:600px){.btt-2090{width:143px;min-height:109px;padding:7px 9px}.frame-pics i{width:33px;height:28px}.frame-pics{gap:4px;padding:7px 0}.frame-text b{font-size:10px}.frame-text small{font-size:7.5px}}

(()=>{'use strict';const el=document.querySelector('[data-btt]');if(!el)return;const footerOnly=false;const reduce=window.matchMedia('(prefers-reduced-motion: reduce)');let raf=0;function update(){raf=0;const p=Math.max(0,Math.min(1,window.scrollY/Math.max(1,document.documentElement.scrollHeight-window.innerHeight)));if(!footerOnly){const shown=window.scrollY>170;el.classList.toggle('btt-visible',shown);el.classList.toggle('btt-hidden',!shown);el.tabIndex=shown?0:-1;el.setAttribute('aria-hidden',String(!shown));}el.style.setProperty('--progress',p.toFixed(3));const field=el.querySelector('[data-state]');if(field)field.textContent=String(Math.max(2,Math.min(4,Math.floor(p*4)+1))).padStart(2,'0')+' / 04';}function onScroll(){if(!raf)raf=requestAnimationFrame(update)}window.addEventListener('scroll',onScroll,{passive:true});window.addEventListener('resize',onScroll,{passive:true});el.addEventListener('click',()=>{el.classList.add('is-going');window.scrollTo({top:0,behavior:reduce.matches?'auto':'smooth'});window.setTimeout(()=>el.classList.remove('is-going'),650)});update()})();

How to Use

Insert the HTML button near the end of body, load the CSS, and include JavaScript using defer. Test scrolling, returning to the top, and positioning on mobile.

Use Case

Photography galleries and portfolios.

Technical Notes

Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.

Mobile：Check tap target, visibility and positioning on small screens.

Browser：Designed for current Chrome, Edge, Firefox and Safari.

Reduced Motion：CSS animations respect the reduced-motion preference.