(Node.js) JSON Escape and Unescape a String

Demonstrates how to JSON escape or unescape a string.

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() {

    var sb = new chilkat.StringBuilder();

    sb.Append("backslash: \\\\, A: \\u0041");
    console.log(sb.GetAsString());

    // The output is:
    //    backslash: \\, A: \u0041

    // The keyword "json" can be used
    // to escape and unescape.  To escape is to encode.  To unescape is to decode.

    // Unescape (decode) the string in sb.
    sb.Decode("json","utf-8");
    console.log(sb.GetAsString());

    // After JSON unescaping:
    //    backslash: \, A: A

    // Now JSON escape the string.
    sb.Encode("json","utf-8");
    console.log(sb.GetAsString());

    // After JSON escaping:
    //    backslash: \\, A: A

    // Note: The "A" is not escaped to "\u0041" because there is no need.
    // The "\uXXXX" format would be produced for non-printable control chars.

}

chilkatExample();