Imagemin plugin for OptiPNG

$ npm install imagemin-optipng

const imagemin = require('imagemin');
const imageminOptipng = require('imagemin-optipng');

(async () => {
	await imagemin(['images/*.png'], {
		destination: 'build/images',
		plugins: [
			imageminOptipng()
		]
	});

	console.log('Images optimized!');
})();

Returns a Promise<Buffer>.

Type: object

Type: number
Default: 3

Select an optimization level between 0 and 7.

The optimization level 0 enables a set of optimization operations that require minimal effort. There will be no changes to image attributes like bit depth or color type, and no recompression of existing IDAT datastreams. The optimization level 1 enables a single IDAT compression trial. The trial chosen is what. OptiPNG thinks it’s probably the most effective. The optimization levels 2 and higher enable multiple IDAT compression trials; the higher the level, the more trials.

Level and trials:

1. 1 trial
2. 8 trials
3. 16 trials
4. 24 trials
5. 48 trials
6. 120 trials
7. 240 trials

Type: boolean
Default: true

Apply bit depth reduction.

Type: boolean
Default: true

Apply color type reduction.

Type: boolean
Default: true

Apply palette reduction.

Type: boolean | undefined | null
Default: false

Enable Adam7 PNG interlacing on any images that are processed. Interlaced images look better when they're loaded partially, but usually interlace makes compression less efficient. Set to undefined or null to keep the same interlacing as the input image.

Type: boolean
Default: true

A reasonable amount of effort will be spent to try to recover as much data as possible of a broken image, but the success cannot generally be guaranteed.

Type: Buffer

Buffer to optimize.