docs: update

Author: snitin315

examples/cli/hmr/README.md

@@ -3,6 +3,8 @@
 Hot Module Replacement (HMR) exchanges, adds, or removes modules while an
 application is running, without a full reload of the page.
 
+## --hot
+
 To run this example, run this command in your console or terminal:
 
 ```console
@@ -18,8 +20,8 @@ npx webpack serve --open-target --hot
 In the devtools console you should see:
 
 ```
-[WDS] App updated. Recompiling...
-[WDS] App hot update...
+[webpack-dev-server] App updated. Recompiling...
+[webpack-dev-server] App hot update...
 [HMR] Checking for updates on the server...
 [HMR] Updated modules:
 [HMR]  - ./example.js
@@ -28,3 +30,31 @@ In the devtools console you should see:
 
 You should also see the text on the page itself change to match your edits in
 `example.js`.
+
+## --hot only
+
+Enables Hot Module Replacement without page refresh as a fallback in case of build failures.
+
+```console
+npx webpack serve --open-target --hot only
+```
+
+## What Should Happen
+
+1. The script should open `http://localhost:8080/` in your default browser.
+2. In your editor, open `example.js` and change `const` keyword to `constt` to cause build error.
+3. Open the console in your browser's devtools.
+4. Revert the change in step 2 and change any part of the `innerHTML` string.
+
+In the devtools console you should see:
+
+```
+[webpack-dev-server] App updated. Recompiling...
+[webpack-dev-server] App hot update...
+[HMR] Checking for updates on the server...
+ ⚠️ Ignored an update to unaccepted module ./example.js -> ./app.js
+[HMR] Nothing hot Updated.
+[HMR] App is up to date.
+```
+
+5. Refresh the page and see the text on the page itself change to match your edits in `example.js`.