imagemin-webp 
WebP imagemin plugin
Install
$ npm install imagemin-webp
Usage
const imagemin = require('imagemin');
const imageminWebp = require('imagemin-webp');
(async () => {
await imagemin(['images/*.{jpg,png}'], 'build/images', {
use: [
imageminWebp({quality: 50})
]
});
console.log('Images optimized');
})();API
imageminWebp(options?)(buffer)
Returns a Promise<Buffer> with the optimized image.
options
Type: object
preset
Type: string
Default: default
Preset setting, one of default, photo, picture, drawing, icon and text.
quality
Type: number
Default: 75
Set quality factor between 0 and 100.
alphaQuality
Type: number
Default: 100
Set transparency-compression quality between 0 and 100.
method
Type: number
Default: 4
Specify the compression method to use, between 0 (fastest) and 6 (slowest). This parameter controls the trade off between encoding speed and the compressed file size and quality.
size
Type: number
Set target size in bytes.
sns
Type: number
Default: 80
Set the amplitude of spatial noise shaping between 0 and 100.
filter
Type: number
Set deblocking filter strength between 0 (off) and 100.
autoFilter
Type: boolean
Default: false
Adjust filter strength automatically.
sharpness
Type: number
Default: 0
Set filter sharpness between 0 (sharpest) and 7 (least sharp).
lossless
Type: boolean
Default: false
Encode images losslessly.
nearLossless
Type: number
Default: 100
Encode losslessly with an additional lossy pre-processing step, with a quality factor between 0 (maximum pre-processing) and 100 (same as lossless).
crop
Type: object { x: number, y: number, width: number, height: number }
Crop the image.
resize
Type: object { width: number, height: number }
Resize the image. Happens after crop.
metadata
Type: string | string[]
Default: none
Values: all none exif icc xmp
A list of metadata to copy from the input to the output if present.
buffer
Type: Buffer
Buffer to optimize.