pngquant-bin

Compress PNG images

This feature allows you to compress PNG images by specifying the quality range. The code sample demonstrates how to use the pngquant-bin package to compress an image named 'input.png' and save the compressed version as 'output.png'.

const pngquant = require('pngquant-bin');
const { execFile } = require('child_process');

execFile(pngquant, ['--quality=65-80', 'input.png', '-o', 'output.png'], err => {
  if (err) {
    throw err;
  }
  console.log('Image compressed successfully');
});

Batch processing of PNG images

This feature allows you to compress multiple PNG images in a directory. The code sample demonstrates how to read all files in the 'images' directory, compress each one, and save the compressed versions in the 'compressed_images' directory.

const pngquant = require('pngquant-bin');
const { execFile } = require('child_process');
const fs = require('fs');
const path = require('path');

const inputDir = 'images';
const outputDir = 'compressed_images';

fs.readdir(inputDir, (err, files) => {
  if (err) {
    throw err;
  }
  files.forEach(file => {
    const inputFile = path.join(inputDir, file);
    const outputFile = path.join(outputDir, file);
    execFile(pngquant, ['--quality=65-80', inputFile, '-o', outputFile], err => {
      if (err) {
        throw err;
      }
      console.log(`${file} compressed successfully`);
    });
  });
});