FallbackJS/fallback.min.js at main · hamzaka97/FallbackJS · GitHub

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(()=>{if(window.Fallback)return;let e=document.createElement("style");e.textContent=`
  .fb-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999999;
    font-family: system-ui,-apple-system,BlinkMacSystemFont;
  }
  .fb-card {
    background: white;
    width: 340px;
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 30px 60px rgba(0,0,0,.25);
  }
  .fb-title {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 6px;
  }
  .fb-text {
    font-size: 14px;
    color: #555;
    line-height: 1.5;
  }
  .fb-actions {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
  }
  .fb-btn {
    background: #007aff;
    color: white;
    border: none;
    border-radius: 10px;
    padding: 6px 14px;
    font-size: 14px;
    cursor: pointer;
  }
  .fb-btn.secondary {
    background: transparent;
    color: #007aff;
  }
  .fb-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(10px);
    border-radius: 14px;
    padding: 8px 14px;
    font-size: 13px;
    color: #444;
    box-shadow: 0 8px 20px rgba(0,0,0,.12);
    z-index: 999999;
  }
  .fb-img-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f2f2f2;
    color: #777;
    font-size: 12px;
    border-radius: 12px;
  }
  `,document.head.appendChild(e);let t=!1,n;function a(e,n){if(t)return;t=!0;let a=document.createElement("div");a.className="fb-overlay",a.innerHTML=`
      <div class="fb-card" role="dialog" aria-modal="true">
        <div class="fb-title">${e}</div>
        <div class="fb-text">${n}</div>
        <div class="fb-actions">
          <button class="fb-btn secondary">Close</button>
          <button class="fb-btn">Reload</button>
        </div>
      </div>
    `;let r=()=>{t=!1,a.remove()};a.querySelector(".secondary").onclick=r,a.querySelector(".fb-btn:not(.secondary)").onclick=()=>location.reload(),a.addEventListener("click",e=>{e.target===a&&r()}),document.addEventListener("keydown",e=>"Escape"===e.key&&r(),{once:!0}),document.body.appendChild(a)}function r(){n||((n=document.createElement("div")).className="fb-banner",n.textContent="Offline mode",document.body.appendChild(n))}function o(){n?.remove(),n=null}window.onerror=()=>a("Unexpected error","This page encountered an error. Reloading may help."),window.addEventListener("unhandledrejection",()=>a("Background error","A background task failed. Reloading may help.")),document.addEventListener("error",e=>{let t=e.target;if("IMG"===t.tagName){let n=document.createElement("div");n.style.display="flex",n.style.alignItems="center",n.style.justifyContent="center",n.style.width=(t.width||240)+"px",n.style.height=(t.height||160)+"px",n.className="fb-img-fallback",n.textContent="Image unavailable",t.replaceWith(n)}},!0),window.addEventListener("offline",r),window.addEventListener("online",o),navigator.onLine||r(),window.Fallback={version:"0.2.0"}})();