> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corbado.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Passkey Login: Automatic Overlay

> Usernameless login flow where the OS automatically displays a passkey overlay without requiring identifier entry. This provides the fastest possible login experience when passkeys are immediately available.

export const ToolingFrame = ({imageURL, caption, imageName, containerBackground = 'rgb(249,250,252,1)'}) => {
  React.useEffect(() => {
    const style = document.createElement('style');
    style.textContent = `
            .drag-hint {
                bottom: 20px;
            }
            .caption-text {
                font-size: 16px;
            }
            @media (max-width: 768px) {
                .drag-hint {
                    bottom: 80px !important;
                }
                .caption-text {
                    font-size: 12px !important;
                }
                .caption-container {
                    padding: 6px !important;
                }
            }
        `;
    document.head.appendChild(style);
    return () => document.head.removeChild(style);
  }, []);
  const [showLightbox, setShowLightbox] = React.useState(false);
  const [viewportPadding, setViewportPadding] = React.useState(100);
  const imgRef = React.useRef(null);
  const containerRef = React.useRef(null);
  const imageTransformRef = React.useRef(null);
  const scaleDisplayRef = React.useRef(null);
  const dragHintRef = React.useRef(null);
  const zoomInBtnRef = React.useRef(null);
  const zoomOutBtnRef = React.useRef(null);
  const resetBtnRef = React.useRef(null);
  const stateRef = React.useRef({
    isDragging: false,
    isZooming: false,
    position: {
      x: 0,
      y: 0
    },
    dragStart: {
      x: 0,
      y: 0
    },
    initialDistance: 0,
    imageDimensions: {
      width: 0,
      height: 0
    },
    imageLoaded: false,
    naturalDimensions: {
      width: 0,
      height: 0
    },
    initialDimensions: {
      width: 0,
      height: 0
    },
    gestureBaseWidth: 0
  });
  const maxScale = 3;
  const zoomStep = 0.2;
  const getViewportPadding = React.useCallback(() => {
    const width = typeof window !== 'undefined' ? window.innerWidth : 1200;
    if (width < 640) return 20;
    if (width < 1024) return 40;
    return 100;
  }, []);
  React.useEffect(() => {
    const updatePadding = () => setViewportPadding(getViewportPadding());
    updatePadding();
    window.addEventListener('resize', updatePadding);
    return () => window.removeEventListener('resize', updatePadding);
  }, [getViewportPadding]);
  const updateTransform = () => {
    if (imageTransformRef.current) {
      const {position, imageDimensions} = stateRef.current;
      imageTransformRef.current.style.transform = `translate(${position.x}px, ${position.y}px)`;
      const img = imageTransformRef.current.querySelector('img');
      if (img && imageDimensions.width) {
        img.style.width = `${imageDimensions.width}px`;
        img.style.height = 'auto';
        void img.offsetHeight;
        const actualHeight = img.offsetHeight;
        if (actualHeight && actualHeight !== imageDimensions.height) {
          stateRef.current.imageDimensions.height = actualHeight;
        }
      }
    }
    if (scaleDisplayRef.current) {
      const {imageDimensions, initialDimensions} = stateRef.current;
      if (initialDimensions.width) {
        const relativeScale = imageDimensions.width / initialDimensions.width * 100;
        scaleDisplayRef.current.textContent = `${Math.round(relativeScale)}%`;
      }
    }
    updateButtonStates();
    updateDragHint();
  };
  const updateButtonStates = () => {
    const {imageDimensions, position, initialDimensions} = stateRef.current;
    if (zoomInBtnRef.current && initialDimensions.width) {
      const absoluteMaxWidth = initialDimensions.width * maxScale;
      const isDisabled = imageDimensions.width >= absoluteMaxWidth;
      zoomInBtnRef.current.style.opacity = isDisabled ? '0.5' : '1';
      zoomInBtnRef.current.style.cursor = isDisabled ? 'not-allowed' : 'pointer';
    }
    if (zoomOutBtnRef.current && initialDimensions.width) {
      const isDisabled = imageDimensions.width <= initialDimensions.width;
      zoomOutBtnRef.current.style.opacity = isDisabled ? '0.5' : '1';
      zoomOutBtnRef.current.style.cursor = isDisabled ? 'not-allowed' : 'pointer';
    }
    if (resetBtnRef.current && initialDimensions.width) {
      const isDisabled = imageDimensions.width === initialDimensions.width && position.x === 0 && position.y === 0;
      resetBtnRef.current.style.opacity = isDisabled ? '0.5' : '1';
      resetBtnRef.current.style.cursor = isDisabled ? 'not-allowed' : 'pointer';
    }
  };
  const updateDragHint = () => {
    if (dragHintRef.current && containerRef.current) {
      const {imageDimensions} = stateRef.current;
      const imgWidth = imageDimensions.width;
      const imgHeight = imageDimensions.height;
      const containerWidth = containerRef.current.offsetWidth;
      const containerHeight = containerRef.current.offsetHeight;
      const shouldShow = imgWidth > containerWidth || imgHeight > containerHeight;
      dragHintRef.current.style.display = shouldShow ? 'block' : 'none';
    }
  };
  const updateContainerCursor = () => {
    if (!containerRef.current) return;
    const {isDragging, imageLoaded, imageDimensions} = stateRef.current;
    if (!imageLoaded) {
      containerRef.current.style.cursor = 'wait';
      return;
    }
    if (isDragging) {
      containerRef.current.style.cursor = 'grabbing';
      return;
    }
    const imgWidth = imageDimensions.width;
    const imgHeight = imageDimensions.height;
    const containerWidth = containerRef.current.offsetWidth;
    const containerHeight = containerRef.current.offsetHeight;
    const isOverflowing = imgWidth > containerWidth || imgHeight > containerHeight;
    containerRef.current.style.cursor = isOverflowing ? 'grab' : 'default';
  };
  const handleDownload = async e => {
    e.preventDefault();
    e.stopPropagation();
    try {
      const response = await fetch(imageURL);
      const blob = await response.blob();
      const url = window.URL.createObjectURL(blob);
      const link = document.createElement('a');
      link.href = url;
      link.download = imageName || 'image.webp';
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      window.URL.revokeObjectURL(url);
    } catch (error) {
      console.error('Download failed:', error);
    }
  };
  const handleImageClick = e => {
    e.preventDefault();
    e.stopPropagation();
    setShowLightbox(true);
  };
  const closeLightbox = () => {
    setShowLightbox(false);
    stateRef.current = {
      isDragging: false,
      isZooming: false,
      position: {
        x: 0,
        y: 0
      },
      dragStart: {
        x: 0,
        y: 0
      },
      initialDistance: 0,
      imageDimensions: {
        width: 0,
        height: 0
      },
      imageLoaded: false,
      naturalDimensions: {
        width: 0,
        height: 0
      },
      initialDimensions: {
        width: 0,
        height: 0
      },
      gestureBaseWidth: 0
    };
  };
  const handleMouseDown = e => {
    const state = stateRef.current;
    if (!containerRef.current || !state.imageDimensions.width || !state.imageDimensions.height) return;
    const containerWidth = containerRef.current.offsetWidth;
    const containerHeight = containerRef.current.offsetHeight;
    const imgWidth = state.imageDimensions.width;
    const imgHeight = state.imageDimensions.height;
    const isOverflowing = imgWidth - containerWidth >= 1 || imgHeight - containerHeight >= 1;
    if (!isOverflowing) return;
    state.isDragging = true;
    state.dragStart = {
      x: e.clientX - state.position.x,
      y: e.clientY - state.position.y
    };
    updateContainerCursor();
  };
  const handleMouseMove = e => {
    const state = stateRef.current;
    if (!state.isDragging || !containerRef.current) return;
    let newX = e.clientX - state.dragStart.x;
    let newY = e.clientY - state.dragStart.y;
    if (state.imageDimensions.width && state.imageDimensions.height) {
      const containerWidth = containerRef.current.offsetWidth;
      const containerHeight = containerRef.current.offsetHeight;
      const imgWidth = state.imageDimensions.width;
      const imgHeight = state.imageDimensions.height;
      const isWider = imgWidth - containerWidth >= 1;
      const isTaller = imgHeight - containerHeight >= 1;
      if (isWider) {
        const halfOverflowX = (imgWidth - containerWidth) / 2;
        newX = Math.min(Math.max(newX, -halfOverflowX), halfOverflowX);
      } else {
        newX = 0;
      }
      if (isTaller) {
        const halfOverflowY = (imgHeight - containerHeight) / 2;
        newY = Math.min(Math.max(newY, -halfOverflowY), halfOverflowY);
      } else {
        newY = 0;
      }
    }
    state.position = {
      x: newX,
      y: newY
    };
    updateTransform();
  };
  const handleMouseUp = () => {
    stateRef.current.isDragging = false;
    updateContainerCursor();
  };
  const handleZoom = (newWidth, centerX, centerY) => {
    const state = stateRef.current;
    if (!containerRef.current || !state.imageDimensions.width || !state.imageDimensions.height) return;
    if (!state.initialDimensions.width || !state.initialDimensions.height) return;
    if (!state.naturalDimensions.width || !state.naturalDimensions.height) return;
    const absoluteMaxWidth = state.initialDimensions.width * maxScale;
    const boundedWidth = Math.max(state.initialDimensions.width, Math.min(absoluteMaxWidth, newWidth));
    const aspectRatio = state.naturalDimensions.height / state.naturalDimensions.width;
    const boundedHeight = boundedWidth * aspectRatio;
    let newX = state.position.x;
    let newY = state.position.y;
    if (centerX !== undefined && centerY !== undefined) {
      const rect = containerRef.current.getBoundingClientRect();
      const offsetX = centerX - rect.left - rect.width / 2;
      const offsetY = centerY - rect.top - rect.height / 2;
      const sizeRatio = boundedWidth / state.imageDimensions.width;
      newX = state.position.x - offsetX * (sizeRatio - 1);
      newY = state.position.y - offsetY * (sizeRatio - 1);
    }
    const containerWidth = containerRef.current.offsetWidth;
    const containerHeight = containerRef.current.offsetHeight;
    const isWiderThanContainer = boundedWidth - containerWidth >= 1;
    const isTallerThanContainer = boundedHeight - containerHeight >= 1;
    if (isWiderThanContainer) {
      const maxX = (boundedWidth - containerWidth) / 2;
      const minX = -maxX;
      newX = Math.min(Math.max(newX, minX), maxX);
    } else {
      newX = 0;
    }
    if (isTallerThanContainer) {
      const maxY = (boundedHeight - containerHeight) / 2;
      const minY = -maxY;
      newY = Math.min(Math.max(newY, minY), maxY);
    } else {
      newY = 0;
    }
    state.position = {
      x: newX,
      y: newY
    };
    state.imageDimensions = {
      width: boundedWidth,
      height: boundedHeight
    };
    updateTransform();
    updateContainerCursor();
  };
  const zoomIn = () => {
    const state = stateRef.current;
    if (!state.initialDimensions.width) return;
    const absoluteMaxWidth = state.initialDimensions.width * maxScale;
    if (state.imageDimensions.width >= absoluteMaxWidth) return;
    const relativeZoomStep = state.initialDimensions.width * zoomStep;
    handleZoom(state.imageDimensions.width + relativeZoomStep);
  };
  const zoomOut = () => {
    const state = stateRef.current;
    if (!state.initialDimensions.width) return;
    if (state.imageDimensions.width <= state.initialDimensions.width) return;
    const relativeZoomStep = state.initialDimensions.width * zoomStep;
    handleZoom(state.imageDimensions.width - relativeZoomStep);
  };
  const resetTransform = () => {
    const state = stateRef.current;
    if (!state.initialDimensions.width || !state.initialDimensions.height) return;
    if (state.imageDimensions.width === state.initialDimensions.width && state.position.x === 0 && state.position.y === 0) return;
    state.imageDimensions = {
      ...state.initialDimensions
    };
    state.position = {
      x: 0,
      y: 0
    };
    updateTransform();
    updateContainerCursor();
  };
  const handleWheel = e => {
    e.preventDefault();
    e.stopPropagation();
    const state = stateRef.current;
    if (!state.imageDimensions.width) return;
    if (e.ctrlKey) {
      const zoomFactor = 1 - e.deltaY * 0.01;
      const newWidth = state.imageDimensions.width * zoomFactor;
      handleZoom(newWidth, e.clientX, e.clientY);
      return;
    }
    const delta = -e.deltaY * 0.001;
    const sizeChange = state.imageDimensions.width * delta;
    const newWidth = state.imageDimensions.width + sizeChange;
    handleZoom(newWidth, e.clientX, e.clientY);
  };
  const getTouchDistance = touches => {
    const dx = touches[0].clientX - touches[1].clientX;
    const dy = touches[0].clientY - touches[1].clientY;
    return Math.sqrt(dx * dx + dy * dy);
  };
  const handleTouchStart = e => {
    const state = stateRef.current;
    if (e.touches.length === 2) {
      e.preventDefault();
      state.isZooming = true;
      state.initialDistance = getTouchDistance(e.touches);
    } else if (e.touches.length === 1) {
      if (!containerRef.current || !state.imageDimensions.width || !state.imageDimensions.height) return;
      const containerWidth = containerRef.current.offsetWidth;
      const containerHeight = containerRef.current.offsetHeight;
      const imgWidth = state.imageDimensions.width;
      const imgHeight = state.imageDimensions.height;
      const isOverflowing = imgWidth - containerWidth >= 1 || imgHeight - containerHeight >= 1;
      if (!isOverflowing) return;
      state.isDragging = true;
      state.dragStart = {
        x: e.touches[0].clientX - state.position.x,
        y: e.touches[0].clientY - state.position.y
      };
      updateContainerCursor();
    }
  };
  const handleTouchMove = e => {
    const state = stateRef.current;
    if (e.touches.length === 2 && state.isZooming) {
      e.preventDefault();
      const currentDistance = getTouchDistance(e.touches);
      const sizeDelta = currentDistance / state.initialDistance;
      const newWidth = state.imageDimensions.width * sizeDelta;
      const centerX = (e.touches[0].clientX + e.touches[1].clientX) / 2;
      const centerY = (e.touches[0].clientY + e.touches[1].clientY) / 2;
      handleZoom(newWidth, centerX, centerY);
      state.initialDistance = currentDistance;
    } else if (e.touches.length === 1 && state.isDragging && containerRef.current) {
      let newX = e.touches[0].clientX - state.dragStart.x;
      let newY = e.touches[0].clientY - state.dragStart.y;
      if (state.imageDimensions.width && state.imageDimensions.height) {
        const containerWidth = containerRef.current.offsetWidth;
        const containerHeight = containerRef.current.offsetHeight;
        const imgWidth = state.imageDimensions.width;
        const imgHeight = state.imageDimensions.height;
        const isWider = imgWidth - containerWidth >= 1;
        const isTaller = imgHeight - containerHeight >= 1;
        if (isWider) {
          const halfOverflowX = (imgWidth - containerWidth) / 2;
          newX = Math.min(Math.max(newX, -halfOverflowX), halfOverflowX);
        } else {
          newX = 0;
        }
        if (isTaller) {
          const halfOverflowY = (imgHeight - containerHeight) / 2;
          newY = Math.min(Math.max(newY, -halfOverflowY), halfOverflowY);
        } else {
          newY = 0;
        }
      }
      state.position = {
        x: newX,
        y: newY
      };
      updateTransform();
    }
  };
  const handleTouchEnd = e => {
    const state = stateRef.current;
    if (e.touches.length < 2) {
      state.isZooming = false;
    }
    if (e.touches.length === 0) {
      state.isDragging = false;
      updateContainerCursor();
    }
  };
  React.useEffect(() => {
    const handleEscape = e => {
      if (e.key === 'Escape' && showLightbox) {
        closeLightbox();
      }
    };
    const preventScroll = e => {
      e.preventDefault();
      e.stopPropagation();
      return false;
    };
    if (showLightbox) {
      const originalOverflow = document.body.style.overflow;
      const originalPosition = document.body.style.position;
      const scrollY = window.scrollY;
      document.body.style.overflow = 'hidden';
      document.body.style.position = 'fixed';
      document.body.style.top = `-${scrollY}px`;
      document.body.style.width = '100%';
      window.addEventListener('wheel', preventScroll, {
        passive: false
      });
      window.addEventListener('touchmove', preventScroll, {
        passive: false
      });
      window.addEventListener('scroll', preventScroll, {
        passive: false
      });
      document.addEventListener('keydown', handleEscape);
      document.addEventListener('mousemove', handleMouseMove);
      document.addEventListener('mouseup', handleMouseUp);
      return () => {
        document.body.style.overflow = originalOverflow;
        document.body.style.position = originalPosition;
        document.body.style.top = '';
        document.body.style.width = '';
        window.scrollTo(0, scrollY);
        window.removeEventListener('wheel', preventScroll);
        window.removeEventListener('touchmove', preventScroll);
        window.removeEventListener('scroll', preventScroll);
        document.removeEventListener('keydown', handleEscape);
        document.removeEventListener('mousemove', handleMouseMove);
        document.removeEventListener('mouseup', handleMouseUp);
      };
    }
  }, [showLightbox]);
  React.useEffect(() => {
    if (!showLightbox || !containerRef.current) return;
    const el = containerRef.current;
    const state = stateRef.current;
    const onGestureStart = e => {
      e.preventDefault();
      e.stopPropagation();
      state.isZooming = true;
      state.gestureBaseWidth = state.imageDimensions.width || state.initialDimensions.width || 0;
    };
    const onGestureChange = e => {
      e.preventDefault();
      e.stopPropagation();
      if (!state.gestureBaseWidth) return;
      const newWidth = state.gestureBaseWidth * e.scale;
      const cx = e.clientX ?? el.getBoundingClientRect().left + el.getBoundingClientRect().width / 2;
      const cy = e.clientY ?? el.getBoundingClientRect().top + el.getBoundingClientRect().height / 2;
      handleZoom(newWidth, cx, cy);
    };
    const onGestureEnd = e => {
      e.preventDefault();
      e.stopPropagation();
      state.isZooming = false;
      state.gestureBaseWidth = 0;
    };
    const onWheelCapture = e => {
      if (e.ctrlKey) {
        e.preventDefault();
        e.stopPropagation();
        const zoomFactor = 1 - e.deltaY * 0.01;
        const newWidth = state.imageDimensions.width * zoomFactor;
        handleZoom(newWidth, e.clientX, e.clientY);
      }
    };
    el.addEventListener('gesturestart', onGestureStart, {
      passive: false
    });
    el.addEventListener('gesturechange', onGestureChange, {
      passive: false
    });
    el.addEventListener('gestureend', onGestureEnd, {
      passive: false
    });
    el.addEventListener('wheel', onWheelCapture, {
      passive: false
    });
    return () => {
      el.removeEventListener('gesturestart', onGestureStart);
      el.removeEventListener('gesturechange', onGestureChange);
      el.removeEventListener('gestureend', onGestureEnd);
      el.removeEventListener('wheel', onWheelCapture);
    };
  }, [showLightbox]);
  return <>
            <div className="flex flex-col">
                <div onClick={e => {
    e.preventDefault();
    e.stopPropagation();
  }}>
                    <Frame caption={caption}>
                        <div onClick={handleImageClick} className="cursor-zoom-in" style={{
    display: 'block',
    position: 'relative'
  }}>
                            <img ref={imgRef} src={imageURL} alt={imageName || caption} className="w-full h-auto" style={{
    pointerEvents: 'none'
  }} />
                        </div>
                    </Frame>
                </div>
                <div className="flex justify-end my-2">
                    <Tooltip tip="Download image">
                        <button onClick={handleDownload} className="bg-white text-black text-xs px-3 py-2 rounded-md border border-gray-300 hover:bg-gray-100 transition-all cursor-pointer">
                            <Icon icon="arrow-down-to-line" iconType="regular" color="black" /> 
                        </button>
                    </Tooltip>
                </div>
            </div>

            {showLightbox && <div style={{
    position: 'fixed',
    top: 0,
    left: 0,
    width: '100%',
    height: '100%',
    backgroundColor: 'rgba(0, 0, 0, 0.95)',
    zIndex: 999999,
    display: 'flex',
    alignItems: 'center',
    cursor: 'default',
    justifyContent: 'center',
    padding: `${Math.round(viewportPadding / 2)}px`,
    touchAction: 'none'
  }} onWheel={e => {
    e.preventDefault();
    e.stopPropagation();
  }}>
                    <div ref={containerRef} style={{
    position: 'relative',
    width: '100%',
    height: '100%',
    minWidth: `calc(100vw - ${viewportPadding}px)`,
    minHeight: `calc(100vh - ${viewportPadding}px)`,
    maxWidth: '100%',
    maxHeight: '100%',
    overflow: 'hidden',
    cursor: 'wait',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: '15px',
    border: '2px solid rgba(255, 255, 255, 0.3)',
    touchAction: 'none',
    backgroundColor: containerBackground,
    userSelect: 'none',
    WebkitUserSelect: 'none',
    MozUserSelect: 'none',
    msUserSelect: 'none',
    WebkitTouchCallout: 'none',
    WebkitTapHighlightColor: 'transparent'
  }} onMouseDown={handleMouseDown} onWheel={handleWheel} onTouchStart={handleTouchStart} onTouchMove={handleTouchMove} onTouchEnd={handleTouchEnd}>
                        <div className="caption-container" style={{
    position: 'absolute',
    left: '20px',
    top: '20px',
    zIndex: 1000000,
    backgroundColor: 'rgba(36, 36, 36, 0.76)',
    padding: '10px',
    borderRadius: '15px',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    pointerEvents: 'none'
  }}>
                            <p className="caption-text" style={{
    fontSize: '16px',
    fontWeight: 'bold',
    color: 'white',
    marginLeft: '10px'
  }}>
                                {caption}
                            </p>
                        </div>
                        <button onClick={closeLightbox} onMouseDown={e => e.stopPropagation()} style={{
    position: 'absolute',
    top: '20px',
    right: '20px',
    background: 'rgba(36, 36, 36, 0.76)',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    color: 'white',
    fontSize: '24px',
    width: '40px',
    height: '40px',
    borderRadius: '50%',
    cursor: 'pointer',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    transition: 'background 0.2s',
    zIndex: 1000000
  }} onMouseEnter={e => {
    e.target.style.background = 'rgba(36, 36, 36, 0.9)';
  }} onMouseLeave={e => {
    e.target.style.background = 'rgba(36, 36, 36, 0.76)';
  }}>
                            ×
                        </button>
                        <div style={{
    position: 'absolute',
    bottom: '20px',
    left: '20px',
    display: 'flex',
    gap: '10px',
    zIndex: 1000000
  }}>
                            <button ref={zoomInBtnRef} onClick={e => {
    e.stopPropagation();
    zoomIn();
  }} onMouseDown={e => e.stopPropagation()} style={{
    background: 'rgba(36, 36, 36, 0.76)',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    color: 'white',
    fontSize: '20px',
    width: '40px',
    height: '40px',
    borderRadius: '8px',
    cursor: 'pointer',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    transition: 'background 0.2s',
    opacity: 1
  }} onMouseEnter={e => {
    if (!e.target.disabled) e.target.style.background = 'rgba(36, 36, 36, 0.9)';
  }} onMouseLeave={e => {
    e.target.style.background = 'rgba(36, 36, 36, 0.76)';
  }}>
                                +
                            </button>
                            <button ref={zoomOutBtnRef} onClick={e => {
    e.stopPropagation();
    zoomOut();
  }} onMouseDown={e => e.stopPropagation()} style={{
    background: 'rgba(36, 36, 36, 0.76)',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    color: 'white',
    fontSize: '20px',
    width: '40px',
    height: '40px',
    borderRadius: '8px',
    cursor: 'not-allowed',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    transition: 'background 0.2s',
    opacity: 0.5,
    pointerEvents: 'auto'
  }} onMouseEnter={e => {
    if (e.target.style.opacity !== '0.5') {
      e.target.style.background = 'rgba(36, 36, 36, 0.9)';
    }
  }} onMouseLeave={e => {
    e.target.style.background = 'rgba(36, 36, 36, 0.76)';
  }}>
                                −
                            </button>
                            <button ref={resetBtnRef} onClick={e => {
    e.stopPropagation();
    resetTransform();
  }} onMouseDown={e => e.stopPropagation()} style={{
    background: 'rgba(36, 36, 36, 0.76)',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    color: 'white',
    fontSize: '16px',
    width: '40px',
    height: '40px',
    borderRadius: '8px',
    cursor: 'not-allowed',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    transition: 'background 0.2s',
    opacity: 0.5,
    pointerEvents: 'auto'
  }} onMouseEnter={e => {
    if (e.target.style.opacity !== '0.5') {
      e.target.style.background = 'rgba(36, 36, 36, 0.9)';
    }
  }} onMouseLeave={e => {
    e.target.style.background = 'rgba(36, 36, 36, 0.76)';
  }}>
                                ⟲
                            </button>
                            <div ref={scaleDisplayRef} style={{
    background: 'rgba(36, 36, 36, 0.76)',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    color: 'white',
    fontSize: '14px',
    padding: '0 12px',
    height: '40px',
    borderRadius: '8px',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    minWidth: '60px',
    pointerEvents: 'none'
  }}>
                                100%
                            </div>
                        </div>
                        <div ref={dragHintRef} className="drag-hint" style={{
    display: 'none',
    position: 'absolute',
    right: '20px',
    bottom: '20px',
    zIndex: 1000000,
    backgroundColor: 'rgba(36, 36, 36, 0.76)',
    padding: '10px 15px',
    borderRadius: '15px',
    border: '1px solid rgba(255, 255, 255, 0.3)',
    pointerEvents: 'none'
  }}>
                            <div style={{
    display: 'flex',
    alignItems: 'center',
    gap: '8px'
  }}>
                                <Icon icon="hand" iconType="regular" color="white" />
                                <p style={{
    fontSize: '12px',
    color: 'white',
    margin: 0
  }}>Drag to move image</p>
                            </div>
                        </div>
                        <div ref={imageTransformRef} style={{
    position: 'relative',
    transform: 'translate(0px, 0px)',
    transition: 'none',
    willChange: 'transform',
    flexShrink: 0,
    minWidth: 0,
    minHeight: 0
  }}>
                            <img src={imageURL} alt={imageName || caption} onLoad={e => {
    const state = stateRef.current;
    const naturalWidth = e.target.naturalWidth;
    const naturalHeight = e.target.naturalHeight;
    if (!containerRef.current) return;
    const containerWidth = containerRef.current.offsetWidth;
    const containerHeight = containerRef.current.offsetHeight;
    const scaleX = containerWidth / naturalWidth;
    const scaleY = containerHeight / naturalHeight;
    const initialScale = Math.min(scaleX, scaleY, 1);
    const initialWidth = naturalWidth * initialScale;
    const initialHeight = naturalHeight * initialScale;
    state.naturalDimensions = {
      width: naturalWidth,
      height: naturalHeight
    };
    state.initialDimensions = {
      width: initialWidth,
      height: initialHeight
    };
    state.imageDimensions = {
      width: initialWidth,
      height: initialHeight
    };
    setTimeout(() => {
      state.imageLoaded = true;
      updateTransform();
      updateContainerCursor();
      updateDragHint();
      if (e.target) {
        e.target.style.opacity = '1';
      }
    }, 100);
  }} style={{
    display: 'block',
    width: 'auto',
    height: 'auto',
    maxWidth: 'none',
    maxHeight: 'none',
    opacity: 0,
    transition: 'opacity 0.2s ease-in-out',
    pointerEvents: 'none',
    userSelect: 'none',
    WebkitUserSelect: 'none',
    MozUserSelect: 'none',
    msUserSelect: 'none',
    WebkitTouchCallout: 'none',
    WebkitTapHighlightColor: 'transparent',
    WebkitDrag: 'none',
    WebkitUserDrag: 'none',
    KhtmlUserSelect: 'none'
  }} draggable="false" />
                        </div>
                    </div>
                </div>}
        </>;
};

## Automatic Passkey Overlay (Usernameless Login)

An OS-driven prompt that automatically appears when passkeys are available, **before the user enters their identifier**. This is a **usernameless flow** that provides the fastest possible login experience by displaying available passkeys immediately.

This flow leverages the **`preferImmediatelyAvailableCredentials`** configuration for iOS and Android, ensuring the overlay screen only appears when a passkey is truly available for login on this device. This prevents the UI from showing when login would fail, significantly improving conversion rates.

<Warning>
  **First Installation Delay:** On first app installation, the automatic overlay may take some time to appear as the operating system needs to verify domain associations:

  * **iOS:** Verifies **Associated Domains** via the `apple-app-site-association` file
  * **Android:** Verifies **Digital Asset Links** via the `.well-known/assetlinks.json` file

  These verification files determine which domains are authorized to use passkeys with your app. After initial verification completes, the overlay appears instantly on subsequent app launches.
</Warning>

<Tabs>
  <Tab title="iOS">
    <ToolingFrame imageURL="/images/authentication-flow/native-app/automatic-passkey-overlay-ios-native.webp" caption="Native: iOS automatic passkey overlay flow" imageName="automatic-passkey-overlay-ios-native.webp" />
  </Tab>

  <Tab title="Android">
    <ToolingFrame imageURL="/images/authentication-flow/native-app/automatic-passkey-overlay-android-native.webp" caption="Native: Android automatic passkey overlay flow" imageName="automatic-passkey-overlay-android-native.webp" />
  </Tab>
</Tabs>

<Info>
  **Technical Implementation:** This flow uses `preferImmediatelyAvailableCredentials` to ensure the overlay only displays when passkeys are immediately available on the device. This configuration is only available natively (with some exceptions). If you need support for security keys or cross-device authentication (CDA), a different configuration must be used - contact us for implementation guidance.
</Info>

<Info>
  **Product-Native Steps:** The blue background indicates optional product-native steps (e.g., verification code, setup PIN, enabling biometrics). **PIN and local biometrics are optional features** for protecting app access within sessions after passkey authentication completes. Learn more about [how passkeys and local biometrics work together](https://www.corbado.com/blog/passkeys-local-biometrics) to provide both secure remote authentication (passkeys) and convenient app protection (local biometrics).
</Info>

<Steps>
  <Step title="OS automatically displays passkey overlay">
    * The overlay appears automatically when the app login screen is shown, WITHOUT requiring the user to enter their identifier first.
    * This is a usernameless flow - the system displays ALL available passkeys for this app.
    * OS/app automatically triggers overlay modal for passkey authentication showing all passkeys stored on this device for this app.
  </Step>

  <Step title="User selects passkey and authenticates">
    * User selects their passkey from the available options.
    * The system now knows which user account is authenticating.
    * User authenticates using biometrics/PIN.
  </Step>

  <Step title="App PIN setup">
    * After successful passkey authentication, the user is signed in and is asked
      to set up PIN.
  </Step>

  <Step title="Enable local biometric for app login">
    * User is allowed to enable/disable local biometric app login (provided
      as product feature).
  </Step>
</Steps>