(Node.js) Decode 2-digit Hex Escaped

Demonstrates how to replace escaped us-ascii chars such as \x7b and \x22 with the chars.

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

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // We have the following string with some us-ascii chars escaped like this:
    var s = "\x7b\x22responseContext\x22:\x7b\x22";

    // Note: The above escaping does not conform to any standard format (as far as I know).
    // Chilkat does not have anything to decode from the above.
    // However, we can 1st transform into a standard format, and then decode..

    // JSON escapes chars outside us-ascii like this:  "Hello, \ud83d\ude03!"
    // We can transform the above to this:  "\u007b\u0022responseContext\u0022:\u007b\u0022"
    // And then decode..

    var sb = new chilkat.StringBuilder();

    sb.Append(s);
    var numReplaced = sb.Replace("\\x","\\u00");

    // Now decode from "json" escapes
    sb.Decode("json","utf-8");

    // Show the decoded string
    console.log(sb.GetAsString());

    // Here's the result: {"responseContext":{"

}

chilkatExample();