feat: allow passing active prop that allows preventing inactive webivews from showing JS alerts

[jkadamczyk]

This PR introduces a new native prop for the webview.
The new prop is active: boolean.
When webview is marked active={false} JS alerts will be prevented from being shown to the user.
When webview is marked active={true} or the prop is not passed at all, alerts will show like they normally do.

Summary by CodeRabbit

• New Features

  • Added an active property to control whether a WebView is considered active.
  • When a WebView is inactive, JavaScript dialogs (alert, confirm, prompt) are suppressed on Android and iOS to avoid prompts from non-active tabs.

• Chores

  • Added a changelog entry noting the new prop and behavior.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Adds an active property across platforms that, when false, causes WebView implementations to suppress JavaScript dialogs (alert/confirm/prompt) by short-circuiting native dialog callbacks. The default value is true.

Changes

Cohort / File(s)	Summary
TypeScript Types src/WebViewTypes.ts, src/RNCWebViewNativeComponent.ts	Added active?: boolean to shared props and active?: WithDefault<boolean, true> to native props (default true).
Android WebView Core android/src/main/java/com/reactnativecommunity/webview/RNCWebView.java, android/src/main/java/com/reactnativecommunity/webview/RNCWebChromeClient.java	Exposed protected mActive with setActive/isActive; added onJsAlert, onJsConfirm, onJsPrompt overrides to cancel/consume JS dialogs when view is inactive.
Android Manager Bridge android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManagerImpl.kt, android/src/newarch/com/reactnativecommunity/webview/RNCWebViewManager.java, android/src/oldarch/com/reactnativecommunity/webview/RNCWebViewManager.java	Added setActive(viewWrapper, value) in impl and @ReactProp(name = "active") setters in manager(s) to forward the prop to the native view.
iOS Implementation apple/RNCWebViewImpl.h, apple/RNCWebViewImpl.m	Added active property; initialize to YES and short-circuit WKNavigationDelegate dialog handlers (alert/confirm/text input) to return default responses when inactive.
iOS Manager Bridge apple/RNCWebViewManager.mm	Added RCT_CUSTOM_VIEW_PROPERTY(active, BOOL, RNCWebViewImpl) to expose the active property to React Native.
Changelog .changeset/huge-onions-lie.md	Added changeset entry documenting the new active prop and minor version bump.

Sequence Diagram(s)

mermaid
sequenceDiagram
participant JS as React JS
participant RN as RN ViewManager
participant Native as WebView (native)
participant Dialog as WebChromeClient / WK handlers

JS->>RN: set prop active = false
RN->>Native: setActive(false)
JS->>Native: page triggers alert/confirm/prompt
Native->>Dialog: invoke dialog callback
Dialog-->>Native: detect inactive -> cancel/return default
Native-->>JS: default response returned / no native dialog shown

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 12.50% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: introducing an 'active' prop to prevent inactive webviews from showing JS alerts, which matches the changeset across multiple platform implementations.

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✨ Finishing touches

• 📝 Generate docstrings

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In
`@android/src/main/java/com/reactnativecommunity/webview/RNCWebChromeClient.java`:
- Around line 485-513: Fix the minor typo in the JavaDoc comment above onJsAlert
in RNCWebChromeClient: change "webiew" to "webview" so the comment reads
"Security: Prevent dialogs from being presented when webview is inactive." Leave
the implementation of onJsAlert, onJsConfirm, and onJsPrompt unchanged.