claudiuandrei / react-easy-crop

A React component to crop images with easy interactions

react-easy-crop

A React component to crop images with easy interactions

Demo

Check out the examples:

• Basic example
• Example with output of the cropped image
• Example with image selected by the user

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.
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.
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

onCropComplete(croppedArea, cropperAreaPixels)

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. cropperAreaPixels: 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