cropperjs-react

React component wrapper for CropperJS using react hooks

Table of Contents

• Overview
• Getting Started
• Usage

Overview

React component wrapping CropperJS library using React hooks (useEffect and useState).

This wrapper accommodates all the functionality of the CropperJS library.

To get data back from the cropper once the cropper object has initialized, update the getter object, e.g.:

setGetter({ action: 'getCanvasData', func: setCanvasData });

The cropper data, in this case the canvas data, will be passed into the supplied function as an argument. In this example, the canvas data will passed into setCanvasData and set into the canvasData state.

To set data in the cropper object use the setter object, e.g.:

setSetter({ action: 'setData', data: { width: 300, height: 600 } });

This example will update the width and height of the crop box to be 300px by 600px.

Getting Started

npm install cropperjs-react

Usage

import React, { useEffect, useState } from 'react';
import CropperJSWrapper from 'cropperjs-react';

const CropperJSWrapperExample = () => {
  const [containerData, setContainerData] = useState(null);
  const [canvasData, setCanvasData] = useState(null);
  const [croppedData, setCroppedData] = useState(defaultCroppedData);

  const [getter, setGetter] = useState({ action: '', func: () => {} });
  const [setter, setSetter] = useState({ action: '', data: {} });

  const imageUrl = 'https://cdn.thisiswhyimbroke.com/images/creepy-horse-head-squirrel-feeder2.jpg';

  const onCrop = (cropEvent) => {
    setGetter({ action: 'getCanvasData', func: updateCanvasData });
    setCroppedData(cropEvent.detail);
  };

  const initializeCropper = () => {
    setGetter({ action: 'getCanvasData', func: setCanvasData });
    setGetter({ action: 'getContainerData', func: setContainerData });
    setGetter({ action: 'getData', func: setCroppedData });
  };

  const onZoom = () => {
    setGetter({ action: 'getCanvasData', func: setCanvasData });
  };

  return (
    <CropperJSWrapper
      imageUrl={imageUrl} // required
      onCrop={onCrop} // required
      onReady={initializeCropper}
      onZoom={onZoom}
      getter={getter}
      setter={setter}
    />
  )
}