react-images-uploading

react-images-uploading

The simple images uploader applied Render Props pattern. (You can read more about this pattern here).

This approach allows you to fully control UI component and behaviours.

See the intro blog post

Installation

npm

npm install --save react-images-uploading

or

yarn

yarn add react-images-uploading

Usage

You can check out the basic demo here:

• Javascript: https://codesandbox.io/s/react-images-uploading-demo-u0khz

Basic

import React from 'react';
import ImageUploading from 'react-images-uploading';

export function App() {
  const [images, setImages] = React.useState([]);
  const maxNumber = 69;

  const onChange = (imageList, addUpdateIndex) => {
    // data for submit
    console.log(imageList, addUpdateIndex);
    setImages(imageList);
  };

  return (
    <div className="App">
      <ImageUploading
        multiple
        value={images}
        onChange={onChange}
        maxNumber={maxNumber}
        dataURLKey="data_url"
      >
        {({
          imageList,
          onImageUpload,
          onImageRemoveAll,
          onImageUpdate,
          onImageRemove,
          isDragging,
          dragProps,
        }) => (
          // write your building UI
          <div className="upload__image-wrapper">
            <button
              style={isDragging ? { color: 'red' } : undefined}
              onClick={onImageUpload}
              {...dragProps}
            >
              Click or Drop here
            </button>
            &nbsp;
            <button onClick={onImageRemoveAll}>Remove all images</button>
            {imageList.map((image, index) => (
              <div key={index} className="image-item">
                <img src={image['data_url']} alt="" width="100" />
                <div className="image-item__btn-wrapper">
                  <button onClick={() => onImageUpdate(index)}>Update</button>
                  <button onClick={() => onImageRemove(index)}>Remove</button>
                </div>
              </div>
            ))}
          </div>
        )}
      </ImageUploading>
    </div>
  );
}

Validation

...
  {({ imageList, onImageUpload, onImageRemoveAll, errors }) => (
    <div>
      {errors.maxNumber && <span>Number of selected images exceed maxNumber</span>}
      {errors.acceptType && <span>Your selected file type is not allow</span>}
      {errors.maxFileSize && <span>Selected file size exceed maxFileSize</span>}
      {errors.resolution && <span>Selected file is not match your desired resolution</span>}
    </div>
  )}
...

Drag and Drop

...
  {({ imageList, dragProps, isDragging }) => (
    <div {...dragProps}>
      {isDragging ? "Drop here please" : "Upload space"}
      {imageList.map((image, index) => (
        <img key={index} src={image.data_url} />
      ))}
    </div>
  )}
...

Props

parameter	type	options	default	description
value	array		[]	List of images
onChange	function	(imageList, addUpdateIndex) => void		Called when add, update or delete action is called
dataURLKey	string		dataURL	Customized field name that base64 of selected image is assigned to
multiple	boolean		false	Set true for multiple chooses
maxNumber	number		1000	Number of images user can select if mode = multiple
onError	function	(errors, files) => void		Called when it has errors
acceptType	array	['jpg', 'gif', 'png']	[]	The file extension(s) to upload
maxFileSize	number			Max image size (Byte) and it is used in validation
resolutionType	string	'absolute' | 'less' | 'more' | 'ratio'		Using for image validation with provided width & height
resolutionWidth	number	> 0
resolutionHeight	number	> 0

Note

resolutionType

value	description
absolute	image's width === resolutionWidth && image's height === resolutionHeight
ratio	(resolutionWidth / resolutionHeight) === (image width / image height)
less	image's width < resolutionWidth && image's height < resolutionHeight
more	image's width > resolutionWidth && image's height > resolutionHeight

Exported options

parameter	type	description
imageList	array	List of images to render.
onImageUpload	function	Called when an element is clicks and triggers to open a file dialog
onImageRemoveAll	function	Called when removing all images
onImageUpdate	(updateIndex: number) => void	Called when updating an image at updateIndex.
onImageRemove	(deleteIndex: number | number[]) => void	Called when removing one or list image.
errors	object	Exported object of validation
dragProps	object	Native element props for drag and drop feature
isDragging	boolean	"true" if an image is being dragged