node-image-resizer

Get some image and generate its smaller copies. You can also control the quality, brightness and contrast. Asynchronously.

Installation

npm i -D node-image-resizer

Usage

import resizer from 'node-image-resizer';

(async () => {
  await resizer('./image.jpg', setup);
})();

Returns array of file names (with path) for generated thumbnails.

Setup

You can create as many thumbnails from your image as you wish.

All definitions (for each thumbnail separately) are grouped in one object with following structure:

const setup = { 
  all: {},                 // general settings to apply on each thumbnail
  versions: [{}, {}, {}]   // unique settings for each thumbnail; will overwrite general setting
};

for example:

const setup = { 
  all: {
    path: './thumbnails/',
    quality: 80
  },
  versions: [{
    prefix: 'big_',
    width: 1024,
    height: 768
  }, {
    prefix: 'medium_',
    width: 512,
    height: 256
  }, {
    quality: 100,
    prefix: 'small_',
    width: 128,
    height: 64
  }]
};

// create thumbnails
const thumbs = await resizer('./image.jpg', setup);

Settings from versions overwrite values from all.

Options

All options are optional.

name | type | default | description ---|---|---|--- path | string | | Destination path for generated image. prefix | string | | Used to create file name based on source file name. Will overwrite a file with the same name if exists. suffix | string | | Used to create file name based on source file name. Will overwrite a file with the same name if exists. width | number | source image width | Width of the new image (in px). height | number | source image height | Height of the new image (in px). contrast | number | | Adjust the contrast by a value -1 to +1. brightness | number | | Adjust the brightness by a value -1 to +1. quality | number | | Set the quality of saved JPEG by a value 0 - 100. normalize | boolean | false | Normalize the channels in the new image.

License

MIT