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imagemin-optipng
Advanced tools
The imagemin-optipng package is a plugin for Imagemin that uses the OptiPNG optimizer to compress PNG images. It helps in reducing the file size of PNG images without losing quality, making it ideal for web developers looking to optimize their images for faster loading times.
Basic PNG Optimization
This code demonstrates how to use imagemin-optipng to optimize PNG images in the 'images' directory and save the optimized images to the 'build/images' directory.
const imagemin = require('imagemin');
const imageminOptipng = require('imagemin-optipng');
(async () => {
await imagemin(['images/*.png'], {
destination: 'build/images',
plugins: [
imageminOptipng()
]
});
console.log('Images optimized');
})();
Custom Optimization Level
This code shows how to set a custom optimization level for the PNG images. The optimizationLevel option can be set from 0 to 7, where higher values provide better compression but take more time.
const imagemin = require('imagemin');
const imageminOptipng = require('imagemin-optipng');
(async () => {
await imagemin(['images/*.png'], {
destination: 'build/images',
plugins: [
imageminOptipng({ optimizationLevel: 3 })
]
});
console.log('Images optimized with custom optimization level');
})();
imagemin-pngquant is another Imagemin plugin that uses the pngquant library to compress PNG images. It is known for providing lossy compression, which can result in smaller file sizes compared to imagemin-optipng, but with a potential loss in image quality.
imagemin-zopfli is an Imagemin plugin that uses the Zopfli compression algorithm to optimize PNG images. It provides high compression ratios, often better than imagemin-optipng, but at the cost of longer compression times.
imagemin-pngcrush is an Imagemin plugin that uses the PNGCrush optimizer to reduce the file size of PNG images. It offers various optimization strategies and can be a good alternative to imagemin-optipng for certain use cases.
Imagemin plugin for OptiPNG
$ npm install imagemin-optipng
const imagemin = require('imagemin');
const imageminOptipng = require('imagemin-optipng');
(async () => {
await imagemin(['images/*.png'], 'build/images', {
use: [
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:
Type: boolean
Default: true
Apply bit depth reduction.
Type: boolean
Default: true
Apply color type reduction.
Type: boolean
Default: true
Apply palette reduction.
Type: Buffer
Buffer to optimize.
FAQs
Imagemin plugin for OptiPNG
The npm package imagemin-optipng receives a total of 413,608 weekly downloads. As such, imagemin-optipng popularity was classified as popular.
We found that imagemin-optipng demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 7 open source maintainers collaborating on the project.
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