Added documentation for modifyContent (#18)

Author: DanMat

CHANGELOG.md

@@ -6,8 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Documented the page content modification method for internal users.
 
 ## [v2021-05-22T22.11.29] - 2021-05-22
+### Fixed
+- Fixed an unlinked section in the changelog.
 
 ## [v2021-05-22T21.30.10] - 2021-05-22
 

source/includes/_internal.md

@@ -1,3 +1,48 @@
-# DDC specific docs
+# DDC Specific Documentation
 
-All our secrets go here!!
+## Content Modification
+
+This method allows you to modify content on a page level. Right now we only support the modification of the `schedule-service` button. So, by using this method you would be able to modify the link attributes of all the schedule service buttons on a page.
+
+> Usage:
+
+```javascript
+(async APILoader => {
+  const API = await APILoader.create(document.currentScript);
+  API.modifyContent('schedule-service', {
+    schema: {
+      // Attributes of the link you want to add or modify
+    }
+  });
+})(window.DDC.APILoader);
+```
+
+> Schema Object:
+
+```javascript
+{
+  "href": "String", // Link to a new service page
+  "target": "String", // Set the target attribute of the anchor tag
+  "onclick": "Function", // Set an onClick event handler for the button. Remember to reset the href of the button while setting a click event.
+  "popover": "Object", // Popover settings for your button, eg {title: "heading", content: "popover text"}
+  "attributes": "Object" // List of all data attributes that you would want to add to the button
+}
+```
+
+> Example Implementation:
+
+```javascript
+(async APILoader => {
+  const API = await APILoader.create(document.currentScript);
+  API.modifyContent('schedule-service', {
+    schema: {
+      "href": "/schedule-form.htm",
+      "target": "_blank",
+      "attributes": {
+        "data-width": "400px",
+        "data-title": "My custom service"
+      }
+	  }
+  });
+})(window.DDC.APILoader);
+```