update README.md

Author: Saurabh Singh Kushwah

README.md

@@ -4,9 +4,16 @@ Fork of [hex0cter/js-injector](https://github.com/hex0cter/js-injector) with boo
 
 Chrome extension for injecting javascript to the webpage you are visiting. It can be used as a handy tool to make your surfing a bit of more fun.
 
+Useful for custom changes on how you visit a site like blocking some stuff, automation for clicking button and much more..
+
 Useful for automating email address input and redirection for low timeout sites Okta, AWS ..etc.
 Opening links in new tab by default news.ycombinator.com.
 
+Key Features:
+
+1. Supports Pattern Based Injection
+2. Multiple Separate Injection For A Site
+
 ## Usage
 
 1. Open Y Combinator News Link On New Sites
@@ -21,6 +28,50 @@ document
     .forEach(e => element.remove());
 ```
 
+## Sample Snippets
+
+### Y Combinator
+
+Open all links in new tab and also allow to toggle collapse the comment section (only first line of that comment).
+
+```js
+
+// open all links in new tab.
+document.querySelectorAll('a[href]').forEach(a => {
+  a.setAttribute('target', '_blank');
+});
+
+// allow to hide the comment chain on clicking
+// first line/para of the comment.
+function onClickHandler(event) {
+    let target = event.target;
+
+    if (
+        target.nodeName === "DIV" &&
+        target.classList.contains("commtext")
+    ) {
+        target
+            .parentElement
+            .parentElement
+            .querySelector(".togg.clicky")
+            .click();
+    }
+}
+
+document.onclick = onClickHandler;
+```
+
+### WhatsApp
+
+Focus On `favorites` section and remove other sections.
+
+```js
+// focus on favorities only
+document.getElementById('favorites-filter').click();
+// remove all other sections
+document.querySelector('div[aria-label="chat-list-filters"]').remove()
+```
+
 ## License
 
 This code is free to use under the terms of the MIT license.