diff --git a/xadesjs/xadesjs-tests.ts b/xadesjs/xadesjs-tests.ts
new file mode 100644
index 0000000000..e83cb0cf6a
--- /dev/null
+++ b/xadesjs/xadesjs-tests.ts
@@ -0,0 +1,47 @@
+/// <reference path="./xadesjs.d.ts" />
+
+let xmlString = "<root><child1/><child2/><child3/></root>";
+let xmlDoc = new DOMParser().parseFromString(xmlString, "application/xml");
+let signedXml = new xadesjs.SignedXml(xmlDoc);
+
+let alg = {
+    name: "ECDSA",
+    namedCurve: "P-256"
+};
+xadesjs.Application.crypto.subtle.generateKey(
+    alg,
+    false,
+    ["sign", "verify"]
+)
+    .then((keys: CryptoKeyPair) => {
+        signedXml.SigningKey = keys.privateKey;
+
+        // Add the key to the SignedXml document.
+        // Create a reference to be signed.
+        let reference = new xadesjs.Reference();
+        reference.Uri = "";
+        // Add an enveloped transformation to the reference.
+        reference.AddTransform(new xadesjs.XmlDsigEnvelopedSignatureTransform());
+        // Add the reference to the SignedXml object.
+        signedXml.AddReference(reference);
+        // Set prefix for Signature namespace
+        signedXml.Prefix = "ds";
+
+        // Compute the signature.
+        return signedXml.ComputeSignature({ name: "ECDSA", hash: { name: "SHA-256" } } as any);
+    })
+    .then(function () {
+        // Append signature
+        let xmlDigitalSignature = signedXml.GetXml();
+        xmlDoc.documentElement.appendChild(xmlDigitalSignature);
+
+        // Serialize XML document
+        let signedDocument = new XMLSerializer().serializeToString(xmlDoc);
+        return Promise.resolve(signedDocument);
+    })
+    .then((doc: string) => {
+        console.log("Signed document:", doc);
+    })
+    .catch((e) => {
+        console.error("Error", e);
+    })
\ No newline at end of file
diff --git a/xadesjs/xadesjs.d.ts b/xadesjs/xadesjs.d.ts
index 4eb7b6a1c5..9f89cab9f1 100644
--- a/xadesjs/xadesjs.d.ts
+++ b/xadesjs/xadesjs.d.ts
@@ -1,5 +1,15 @@
+// Type definitions for graphene-pk11 v2.0.0
+// Project: https://github.com/PeculiarVentures/graphene
+// Definitions by: Stepan Miroshin <https://github.com/microshine>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 /// <reference path="./promise.d.ts" />
 
+/**
+ * A pure Javascript implementation of XMLDSIG and XAdES based on Web Crypto https://xadesjs.com
+ * v1.0.0
+ */
+
 declare namespace xadesjs {
     
     const APPLICATION_XML: string;