react-easy-crop

A React component to crop images with easy interactions.

react-easy-crop

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Features

  • Supports drag and zoom (using wheel) 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
Shell

or

npm install react-easy-crop --save
Shell

Basic usage

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}
      />
    )
  }
}
Js

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 1 and 3. 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
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
}
Js

Development

yarn
yarn start
Shell

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

GitHub

ricardo-ch/react-easy-crop

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