Improve API for check boxes

demo/90-check-boxes.ts

@@ -0,0 +1,44 @@
+// Simple example to add check boxes to a document
+import * as fs from "fs";
+import { Document, Packer, Paragraph, TextRun, CheckBox } from "docx";
+
+const doc = new Document({
+    sections: [
+        {
+            properties: {},
+            children: [
+                new Paragraph({
+                    children: [
+                        new TextRun("Hello World"),
+                        new TextRun({ break: 1 }),
+                        new CheckBox(),
+                        new TextRun({ break: 1 }),
+                        new CheckBox({ checked: true }),
+                        new TextRun({ break: 1 }),
+                        new CheckBox({ checked: true, checkedState: { value: "2611" } }),
+                        new TextRun({ break: 1 }),
+                        new CheckBox({ checked: true, checkedState: { value: "2611", font: "MS Gothic" } }),
+                        new TextRun({ break: 1 }),
+                        new CheckBox({
+                            checked: true,
+                            checkedState: { value: "2611", font: "MS Gothic" },
+                            uncheckedState: { value: "2610", font: "MS Gothic" },
+                        }),
+                        new TextRun({ break: 1 }),
+                        new CheckBox({
+                            checked: true,
+                            checkedState: { value: "2611", font: "MS Gothic" },
+                            uncheckedState: { value: "2610", font: "MS Gothic" },
+                        }),
+                        new TextRun({ text: "Are you ok?", break: 1 }),
+                        new CheckBox({ checked: true, alias: "Are you ok?" }),
+                    ],
+                }),
+            ],
+        },
+    ],
+});
+
+Packer.toBuffer(doc).then((buffer) => {
+    fs.writeFileSync("My Document.docx", buffer);
+});