docs: add example on handling the webPrefs change (electron#17971)

* docs: add example on handling the webPrefs change Fixes electron#17967 * Update breaking-changes.md
kiku-jw · May 16, 2019 · 5ce5865 · 5ce5865
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diff --git a/docs/api/breaking-changes.md b/docs/api/breaking-changes.md
@@ -106,6 +106,16 @@ The following `webPreferences` option default values are deprecated in favor of
 | `nodeIntegration` | `true` | `false` |
 | `webviewTag` | `nodeIntegration` if set else `true` | `false` |
 
+E.g. Re-enabling the webviewTag
+
+```js
+const w = new BrowserWindow({
+  webPreferences: {
+    webviewTag: true
+  }
+})
+```
+
 ### `nativeWindowOpen`
 
 Child windows opened with the `nativeWindowOpen` option will always have Node.js integration disabled.