diff --git a/js/docx/smoke/api_document/to_json.js b/js/docx/smoke/api_document/to_json.js
new file mode 100644
index 000000000..958244a48
--- /dev/null
+++ b/js/docx/smoke/api_document/to_json.js
@@ -0,0 +1,61 @@
+builder.CreateFile("docx");
+// oParagraph
+    var oDocument = Api.GetDocument();
+    var oParagraph = Api.CreateParagraph();
+        oParagraph.AddText("paragraph");
+        oDocument.Push(oParagraph);
+
+// oTable
+    var oTableStyle = oDocument.CreateStyle("CustomTableStyle", "table");
+        oTableStyle.SetBasedOn(oDocument.GetStyle("Bordered"));
+    var oTable = Api.CreateTable(3, 3);
+        oTable.SetWidth("percent", 100);
+        oTable.SetTableDescription("Empty table");
+        oTable.SetStyle(oTableStyle);
+    var oCell = oTable.GetCell(0, 0);
+        oCell.GetContent().GetElement(0).AddText(oTable.GetClassType());
+        oDocument.Push(oTable);
+
+// oBlockLvlSdt
+    var oBlockLvlSdt = Api.CreateBlockLvlSdt();
+        oBlockLvlSdt.GetContent().GetElement(0).AddText(oBlockLvlSdt.GetClassType());
+        oParagraph = Api.CreateParagraph();
+        oParagraph.AddText("This is a block text content control.");
+        oBlockLvlSdt.Push(oParagraph);
+        oDocument.Push(oBlockLvlSdt)
+
+    var bWriteDefaultTextPr	= false
+    // Specifies if the default text properties will be written to the JSON object or not.
+    var bWriteDefaultParaPr	= false
+    // Specifies if the default paragraph properties will be written to the JSON object or not.
+    var bWriteTheme	= false
+    // Specifies if the document theme will be written to the JSON object or not.
+    var bWriteSectionPr = false
+    // Specifies if the document section properties will be written to the JSON object or not.
+    var bWriteNumberings = false
+    // Specifies if the document numberings will be written to the JSON object or not.
+    var bWriteStyles = false
+    // Specifies if the document styles will be written to the JSON object or not.
+
+    var json = oDocument.ToJSON(bWriteDefaultTextPr,
+        bWriteDefaultParaPr,
+        bWriteTheme,
+        bWriteSectionPr,
+        bWriteNumberings,
+        bWriteStyles);
+
+GlobalVariable["JSON"] = json;
+builder.CloseFile();
+
+////////////////////////
+
+builder.CreateFile("docx");
+    var json = GlobalVariable["JSON"];
+    var oDocumentFromJSON = Api.FromJSON(json);
+    var oDocument = Api.GetDocument();
+        oDocument.GetElement(0).AddText(json);
+        oDocument.Push(oDocumentFromJSON[1]);
+        oDocument.Push(oDocumentFromJSON[2]);
+        oDocument.Push(oDocumentFromJSON[4]);
+builder.SaveFile("docx", "DocumentToJSON.docx");
+builder.CloseFile();
diff --git a/spec/docx/smoke/api_document_spec.rb b/spec/docx/smoke/api_document_spec.rb
index 9ecf875f8..0e6d9e916 100644
--- a/spec/docx/smoke/api_document_spec.rb
+++ b/spec/docx/smoke/api_document_spec.rb
@@ -148,4 +148,13 @@
     expect(docx.elements[0].sector_properties.notes[3].type).to eq('footer2')
     expect(docx.elements[0].sector_properties.notes[3].elements.first.nonempty_runs.first.text).to eq('This is an even page footer')
   end
+
+  it 'ApiDocument | ToJSON' do
+    docx = builder.build_and_parse('js/docx/smoke/api_document/to_json.js')
+    json = JSON.parse(docx.elements[0].nonempty_runs[0].text)
+    expect(json['type']).to eq('document')
+    expect(json['content'][1]['type']).to eq(docx.elements[1].nonempty_runs[0].text)
+    expect(json['content'][2]['type']).to eq(docx.elements[2].rows[0].cells[0].elements[0].nonempty_runs[0].text)
+    expect(json['content'][4]['type']).to eq(docx.elements[4].sdt_content.elements.first.nonempty_runs[0].text)
+  end
 end