fix: safely quote injected object JSON

[alexz-phantom]

Quote injectedJavaScriptObject JSON as a JavaScript string on Android and Apple platforms.

• Prevent template-literal interpolation from executing object data.
• Preserve nested JSON, control characters, and Unicode line separators.
• Add focused Android string-encoding coverage.

Tests: yarn lint, existing Jest suite, focused Java encoding harness.

Summary by CodeRabbit

• Bug Fixes

  • Improved safety when injecting JavaScript objects into WebViews on Android and Apple platforms.
  • Preserved nested JSON, control characters, and Unicode line separators during injection.
  • Prevented injected content from being interpreted as executable template-literal code.

• Tests

  • Added coverage for escaping, nested JSON, special characters, and null values.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: dcf38815-ccc5-4811-b666-afad3d5d77ae

📥 Commits

Reviewing files that changed from the base of the PR and between 413d5ea and a45290f.

📒 Files selected for processing (6)

• .changeset/quote-injected-object-json.md
• android/build.gradle
• android/src/main/java/com/reactnativecommunity/webview/RNCJavaScriptString.java
• android/src/main/java/com/reactnativecommunity/webview/RNCWebView.java
• android/src/test/java/com/reactnativecommunity/webview/RNCJavaScriptStringTest.java
• apple/RNCWebViewImpl.m

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📝 Walkthrough

Walkthrough

The change adds platform-specific JavaScript string quoting for injectedJavaScriptObject on Android and Apple WebViews, replaces template-literal interpolation, adds Android escaping tests, and includes the Android JUnit test dependency.

Changes

Injected object quoting

Layer / File(s)	Summary
Android JavaScript quoting android/src/main/java/com/reactnativecommunity/webview/RNCJavaScriptString.java, android/src/main/java/com/reactnativecommunity/webview/RNCWebView.java, android/src/test/..., android/build.gradle	Adds JavaScript string escaping, uses it when generating injectedObjectJson, and tests nested JSON, control characters, line separators, injection characters, and null values.
Apple JavaScript quoting apple/RNCWebViewImpl.m, .changeset/quote-injected-object-json.md	JSON-serializes and escapes injected strings before embedding them in the generated WKUserScript, with a patch changeset documenting the platform behavior.

Sequence Diagram(s)

sequenceDiagram
  participant NativeWebView
  participant StringQuoter
  participant JavaScriptBridge
  participant WebPage
  NativeWebView->>StringQuoter: quote injected object JSON
  StringQuoter-->>NativeWebView: escaped JavaScript string literal
  NativeWebView->>JavaScriptBridge: define injectedObjectJson()
  JavaScriptBridge->>WebPage: return quoted object JSON

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Suggested reviewers: jamonholmgren

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: safely quoting injected object JSON to prevent template-literal injection.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch security/injected-object-json-escaping

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 Checkov (3.3.8)

android/build.gradle

Traceback (most recent call last):
File "/usr/local/bin/checkov", line 2, in
from checkov.main import Checkov
ModuleNotFoundError: No module named 'checkov'

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