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    React Easy Crop

    A React component to crop images with easy interactions
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    • 3.9 days
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    react-easy-crop

    A React component to crop images with easy interactions

    version Monthly downloads gzip size All Contributors Build Status MIT License PRs Welcome

    react-easy-crop Demo

    Demo

    Check out the examples:

    Features

    • Supports drag and zoom interactions
    • Provides crop dimensions as pixels and percentages
    • Supports any images format (JPEG, PNG, even GIF) as url or base 64 string
    • Mobile friendly

    Installation

    yarn add react-easy-crop
    

    or

    npm install react-easy-crop --save
    

    Basic usage

    The Cropper is styled with position: absolute to take the full space of its parent. Thus, you need to wrap it with an element that uses position: relative or the Cropper will fill the whole page.

    import Cropper from 'react-easy-crop'
    
    class App extends React.Component {
      state = {
        image: 'your-image-url or as base64',
        crop: { x: 0, y: 0 },
        zoom: 1,
        aspect: 4 / 3,
      }
    
      onCropChange = crop => {
        this.setState({ crop })
      }
    
      onCropComplete = (croppedArea, croppedAreaPixels) => {
        console.log(croppedArea, croppedAreaPixels)
      }
    
      onZoomChange = zoom => {
        this.setState({ zoom })
      }
    
      render() {
        return (
          <Cropper
            image={this.state.image}
            crop={this.state.crop}
            zoom={this.state.zoom}
            aspect={this.state.aspect}
            onCropChange={this.onCropChange}
            onCropComplete={this.onCropComplete}
            onZoomChange={this.onZoomChange}
          />
        )
      }
    }
    

    Props

    Prop Type Required Description
    image string The image to be cropped.
    crop { x: number, y: number } Position of the image. { x: 0, y: 0 } will center the image under the cropper.
    zoom number Zoom of the image between minZoom and maxZoom. Defaults to 1.
    rotation (experimental) number (in degrees) Rotation of the image. Defaults to 0. Experimental for now because the output crop area might not be correct when rotation is used. I need to build a proper demo first.
    aspect number Aspect of the cropper. The value is the ratio between its width and its height. The default value is 4/3
    minZoom number Minimum zoom of the image. Defaults to 1.
    maxZoom number Maximum zoom of the image. Defaults to 3.
    cropShape 'rect' \ 'round' Shape of the crop area. Defaults to 'rect'.
    cropSize { width: number, height: number } Size of the crop area (in pixels). If you don't provide it, it will be computed automatically using the aspect prop and the image size. Warning: this cannot be changed once the component is displayed. If you need to change it (based on some user inputs for instance), you can force the component to be reset by using a key.
    showGrid boolean Whether to show or not the grid (third-lines). Defaults to true.
    zoomSpeed number Multiplies the value by which the zoom changes. Defaults to 1.
    crossOrigin string Allows setting the crossOrigin attribute on the image.
    onCropChange Function Called everytime the crop is changed. Use it to update your crop state.
    onZoomChange Function Called everytime the zoom is changed. Use it to update your zoom state.
    onCropComplete Function Called when the user stops moving the image or stops zooming. It will be passed the corresponding cropped area on the image in percentages and pixels
    onImgError Function Called when error occurs while loading an external image
    style { containerStyle: object, imageStyle: object, cropAreaStyle: object } Custom styles to be used with the Cropper. Styles passed via the style prop are merged with the defaults.
    classes { containerClassName: string, imageClassName: string, cropAreaClassName: string } Custom class names to be used with the Cropper. Classes passed via the classes prop are merged with the defaults.
    restrictPosition boolean Whether the position of the image should be restricted to the boundaries of the cropper. Useful setting in case of zoom < 1 or if the cropper should preserve all image content while forcing a specific aspect ratio for image throughout the application. Example: https://codesandbox.io/s/1rmqky233q.
    initialCroppedAreaPixels { width: number, height: number, x: number, y: number} Use this to set the initial crop position/zoom of the cropper (for example, when editing a previously cropped image). The value should be the same as the croppedAreaPixels passed to onCropComplete Example: https://codesandbox.io/s/pmj19vp2yx.
    onInteractionStart Function Called everytime a user starts a wheel, touch or mousedown event.
    onInteractionEnd Function Called everytime a user ends a wheel, touch or mousedown event.

    onCropComplete(croppedArea, croppedAreaPixels)

    This callback is the one you should use to save the cropped area of the image. It's passed 2 arguments:

    1. croppedArea: coordinates and dimensions of the cropped area in percentage of the image dimension
    2. croppedAreaPixels: coordinates and dimensions of the cropped area in pixels.

    Both arguments have the following shape:

    const area = {
      x: number, // x/y are the coordinates of the top/left corner of the cropped area
      y: number,
      width: number, // width of the cropped area
      height: number, // height of the cropped area
    }
    

    Development

    yarn
    yarn start
    

    Now, open http://localhost:3001/index.html and start hacking!

    License

    MIT

    Contributors

    Thanks goes to these wonderful people (emoji key):

    Valentin Hervieu
    Valentin Hervieu

    💬 🐛 💻 📖 💡 🚇 👀 ⚠️ 🔧
    Juntae Kim
    Juntae Kim

    💻
    tafelito
    tafelito

    💻
    Nicklas
    Nicklas

    💻
    Kyle Poole
    Kyle Poole

    💻
    Nathaniel Bibler
    Nathaniel Bibler

    💻
    TheRealSlapshot
    TheRealSlapshot

    💻
    Claudiu Andrei
    Claudiu Andrei

    💻
    MattyBalaam
    MattyBalaam

    💻
    Christian Kehr
    Christian Kehr

    📖
    Christopher Albanese
    Christopher Albanese

    💻

    This project follows the all-contributors specification. Contributions of any kind welcome!

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