(Node.js) PDF List Unsigned Signature Fields

See more PDF Signatures Examples

Demonstrates how to list the unsigned signature fields in a PDF.

Note: This example requires Chilkat v9.5.0.90 or greater.

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() {

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

    var pdf = new chilkat.Pdf();

    // Load a PDF containing 2 remaining unsigned signature fields:
    var success = pdf.LoadFile("qa_data/pdf/doctor_patient_parent.pdf");
    if (success == false) {
        console.log(pdf.LastErrorText);
        return;
    }

    // Note: This example requires Chilkat v9.5.0.90 or greater.
    var json = new chilkat.JsonObject();
    pdf.GetUnsignedSigFields(json);

    json.EmitCompact = false;
    console.log(json.Emit());

    // Result:
    // {
    //   "unsignedSigField": [
    //     "doctor_signature",
    //     "parent_signature"
    //   ]
    // }

    // To iterate over the field names:
    var strVal;

    var i = 0;
    var count_i = json.SizeOfArray("unsignedSigField");
    while (i < count_i) {
        json.I = i;
        strVal = json.StringOf("unsignedSigField[i]");
        console.log(strVal);
        i = i+1;
    }


}

chilkatExample();