Add helper function patchDocument example

demo/88-template-document.ts

@@ -0,0 +1,31 @@
+// Patch a document with patches
+// Import from 'docx' rather than '../build' if you install from npm
+import * as fs from "fs";
+import { IPatch, patchDocument, PatchType, TextRun } from "../build";
+
+export const font = "Trebuchet MS";
+export const getPatches = (fields: { [key: string]: string }) => {
+    const patches: { [key: string]: IPatch } = {};
+
+    for (const field in fields) {
+        patches[field] = {
+            type: PatchType.PARAGRAPH,
+            children: [new TextRun({ text: fields[field], font })],
+        };
+    }
+
+    return patches;
+};
+
+const patches = getPatches({
+    name: "Mr",
+    table_heading_1: "John",
+    item_1: "Doe",
+    paragraph_replace: "Lorem ipsum paragraph",
+});
+
+patchDocument(fs.readFileSync("demo/assets/simple-template.docx"), {
+    patches,
+}).then((doc) => {
+    fs.writeFileSync("My Document.docx", doc);
+});