(Node.js) Compress Bytes

Demonstrates how to compress binary data.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var fac = new chilkat.FileAccess();

    fileBytes = fac.ReadEntireFile("qa_data/bmp/big.bmp");
    if (fac.LastMethodSuccess !== true) {
        console.log(fac.LastErrorText);
        return;
    }

    var compress = new chilkat.Compression();
    compress.Algorithm = "deflate";

    compressedBytes = compress.CompressBytes(fileBytes);
    if (compress.LastMethodSuccess !== true) {
        console.log(compress.LastErrorText);
        return;
    }

    var success = fac.WriteEntireFile("qa_output/compressedBmp.dat",compressedBytes);
    if (fac.LastMethodSuccess !== true) {
        console.log(fac.LastErrorText);
        return;
    }


}

chilkatExample();