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@tbouffard tbouffard commented Mar 24, 2025

Simplify null checks and introduce the xmlUtils.isElement internal function that narrow down Element type (no longer need to cast types manually).
This new function is used in other places when possible.

Summary by CodeRabbit

  • Refactor

    • Streamlined internal processing of interface components to simplify element and attribute handling, ensuring robust and consistent behavior.
    • Enhanced logic for checking node types using a centralized utility function.
  • New Features

    • Introduced a new utility function isElement for improved element type checking across various components.
  • Tests

    • Added a new test suite for the isNumeric function, covering various input scenarios to ensure expected behavior.

These improvements enhance the app’s stability and reliability while keeping user functionality and appearance unchanged.

Simplify null checks and introduce the `xmlUtils.isElement` internal function that narrow down Element type (no longer need to cast types manually).
This new function is used in other places when possible.
@tbouffard tbouffard added the refactor Code refactoring label Mar 24, 2025
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coderabbitai bot commented Mar 24, 2025

Walkthrough

Several files have been updated to streamline control flow and enforce stricter type handling when processing XML nodes. The changes replace direct comparisons to a constant with a new utility function isElement, update loop conditions to use simple truthy checks, and revise attribute retrieval using non-null assertions and optional chaining. Additionally, a new internal type UserObject has been introduced, and local definitions have been replaced with imports. Utility functions and documentation comments have also been refined for clarity and consistency across the codebase.

Changes

Files Change Summary
packages/core/src/editor/EditorPopupMenu.ts, packages/core/src/serialization/ObjectCodec.ts, packages/core/src/serialization/codecs/CellCodec.ts, packages/core/src/serialization/codecs/ChildChangeCodec.ts, packages/core/src/serialization/codecs/RootChangeCodec.ts, packages/core/src/serialization/codecs/StylesheetCodec.ts, packages/core/src/serialization/codecs/editor/EditorCodec.ts, packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts, packages/core/src/view/geometry/node/StencilShape.ts Refactored control flow by replacing direct NODETYPE checks with the isElement utility function, streamlined loop conditions with truthy checks, and updated attribute handling using non-null assertions and optional chaining.
packages/core/src/internal-types.ts, packages/core/src/view/cell/Cell.ts Introduced the new internal type UserObject and replaced local type definitions with an import, standardizing element attribute methods with isElement.
packages/core/src/util/domUtils.ts, packages/core/src/util/xmlUtils.ts Updated utility functions to use optional chaining and nullish coalescing, improved documentation references, and added the new isElement function for consistent node type verification.
packages/core/src/util/mathUtils.ts Updated the type signature of the isNumeric function to include a type predicate.
packages/core/__tests__/util/mathUtils.test.ts Introduced a new test suite for the isNumeric function with various test cases.

Sequence Diagram(s)

sequenceDiagram
    participant Decoder
    participant DOMNode as Node
    participant Util as isElement()

    Decoder->>DOMNode: Retrieve first/child node
    DOMNode-->>Decoder: Return node
    Decoder->>Util: Evaluate node with isElement(node)
    Util-->>Decoder: Return true/false
    alt Node is an element
        Decoder->>Decoder: Process node attributes and children
    else Node is not an element
        Decoder->>Decoder: Skip or apply alternative handling
    end
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Actionable comments posted: 0

🧹 Nitpick comments (3)
packages/core/src/editor/EditorPopupMenu.ts (1)

194-194: Consider using optional chaining instead of non-null assertion.

Using the non-null assertion operator (!) assumes that item.getAttribute('as') will never return null, which could lead to runtime errors if this assumption is ever violated.

Consider using optional chaining with a fallback value instead:

-let as = item.getAttribute('as')!;
+let as = item.getAttribute('as') || '';

This would provide better error handling while still simplifying the code.

packages/core/src/serialization/codecs/editor/EditorCodec.ts (2)

198-198: Simplified null checking with non-null assertion.

Changed from type assertion <string> to non-null assertion operator ! which aligns with the PR objective to simplify null checks. However, be careful with non-null assertions as they bypass TypeScript's type checking.

A safer alternative would be to add a null check:

-Translations.add(tmp.getAttribute('basename')!);
+const basename = tmp.getAttribute('basename');
+if (basename) {
+  Translations.add(basename);
+}

200-200: Simplified null checking with non-null assertion.

Similar to the previous change, this replaces type assertion with a non-null assertion. While it aligns with the PR objective to simplify null checks, it might be better to handle potential null values explicitly.

Consider adding a null check:

-addLinkToHead('stylesheet', tmp.getAttribute('name')!);
+const name = tmp.getAttribute('name');
+if (name) {
+  addLinkToHead('stylesheet', name);
+}
📜 Review details

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Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between 15c50d0 and 21a1cdc.

📒 Files selected for processing (14)
  • packages/core/src/editor/EditorPopupMenu.ts (1 hunks)
  • packages/core/src/internal-types.ts (1 hunks)
  • packages/core/src/serialization/Codec.ts (4 hunks)
  • packages/core/src/serialization/ObjectCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/CellCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/ChildChangeCodec.ts (3 hunks)
  • packages/core/src/serialization/codecs/RootChangeCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/StylesheetCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/editor/EditorCodec.ts (1 hunks)
  • packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts (2 hunks)
  • packages/core/src/util/domUtils.ts (3 hunks)
  • packages/core/src/util/xmlUtils.ts (3 hunks)
  • packages/core/src/view/cell/Cell.ts (4 hunks)
  • packages/core/src/view/geometry/node/StencilShape.ts (4 hunks)
🧰 Additional context used
🧬 Code Definitions (11)
packages/core/src/serialization/Codec.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/serialization/codecs/CellCodec.ts (2)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/view/cell/Cell.ts (1)
  • Cell (74-887)
packages/core/src/serialization/codecs/StylesheetCodec.ts (2)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/util/domUtils.ts (1)
  • getTextContent (87-89)
packages/core/src/serialization/ObjectCodec.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/util/xmlUtils.ts (1)
packages/core/src/internal-types.ts (1)
  • UserObject (21-28)
packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/serialization/codecs/RootChangeCodec.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/view/geometry/node/StencilShape.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/serialization/codecs/editor/EditorCodec.ts (1)
packages/core/src/util/domUtils.ts (1)
  • addLinkToHead (339-361)
packages/core/src/serialization/codecs/ChildChangeCodec.ts (1)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/view/cell/Cell.ts (2)
packages/core/src/util/xmlUtils.ts (1)
  • isElement (257-258)
packages/core/src/util/Utils.ts (1)
  • isNotNullish (66-67)
🪛 Biome (1.9.4)
packages/core/src/serialization/codecs/StylesheetCodec.ts

[error] 166-166: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

⏰ Context from checks skipped due to timeout of 90000ms (1)
  • GitHub Check: build (windows-2022)
🔇 Additional comments (45)
packages/core/src/serialization/codecs/CellCodec.ts (3)

23-23: Good addition of the isElement utility function import.

Importing the utility function for element type checking improves the code organization and follows the PR objective of simplifying type management.


85-85: Great replacement of direct nodeType check with isElement utility.

This change enhances readability and type safety by using the dedicated utility function instead of directly checking against NODETYPE.ELEMENT constant. The function properly handles null/undefined values with optional chaining.


93-93: Good consistent use of isElement utility.

Replacing the direct nodeType check with isElement function here maintains consistency with the other changes and improves the type checking mechanism throughout the codebase.

packages/core/src/internal-types.ts (1)

17-28: Well-structured UserObject type definition.

The new UserObject type provides a clear interface for objects that behave like XML elements but might not be actual DOM Elements. The optional properties appropriately model the subset of Element functionality needed by the codebase, and the internal/private markings clearly indicate its intended usage scope.

This addition aligns well with the PR objective of simplifying type management by providing a specific type for user objects that can be used with the new isElement utility function.

packages/core/src/serialization/Codec.ts (4)

25-25: Good addition of the isElement utility function import.

Adding this import supports the PR's goal of simplifying type management across the codebase.


251-251: Appropriate use of isElement for element type checking.

Replacing the direct nodeType check with the isElement utility function improves code readability and maintainability. The type predicate in isElement also helps TypeScript understand the type narrowing.


362-362: Good consistent use of isElement utility.

This change maintains consistency with the other changes throughout the codebase, making element type checks more standardized.


432-432: Well-applied isElement check in negative condition.

Using !isElement(node) instead of the previous complex condition simplifies the code while maintaining the same functionality. This is a good example of how the utility function can improve code clarity.

packages/core/src/editor/EditorPopupMenu.ts (1)

189-189: Simplified loop condition improves readability.

Changing from explicit null check to a truthy check is cleaner, as both achieve the same result in this context. This aligns with the PR's goal of simplifying null checks.

packages/core/src/view/geometry/node/StencilShape.ts (4)

36-36: Added utility import to replace direct node type comparisons.

Good addition. Importing the new isElement type predicate function will help improve type safety by narrowing down Element types automatically.


279-281: Replaced direct nodeType check with isElement utility function.

Nice refactoring. Using isElement(tmp) instead of checking against NODETYPE.ELEMENT directly makes the code more readable and type-safe. The type predicate ensures TypeScript knows that tmp is an Element inside the conditional block.


378-398: Simplified node type checking with isElement.

Good change. Using the isElement() type predicate here improves code consistency and provides better type safety in the conditional block, letting TypeScript know that childNode is an Element when accessing properties and methods.


426-428: Consistent use of isElement for type checking.

This third instance of replacing direct nodeType comparison with the isElement() function maintains consistency throughout the file and improves type safety.

packages/core/src/util/xmlUtils.ts (3)

29-29: Added import for UserObject type.

Good addition. Importing the UserObject type from internal-types will support the implementation of the isElement function.


232-237: Updated findNode to use the new isElement function.

The refactoring improves consistency by using the new utility function instead of direct nodeType comparison. This is more maintainable and ensures consistent node type checking across the codebase.


252-258: Added new isElement utility function.

Well-implemented type predicate function that simplifies checking if a node is an Element. The function:

  1. Uses optional chaining (?.) for null safety
  2. Returns a TypeScript type predicate (node is Element) to narrow down types
  3. Properly handles optional/nullable parameters
  4. Includes JSDoc with @internal and @private markers

This will help eliminate manual type casting throughout the codebase as mentioned in the PR objectives.

packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts (2)

27-27: Added import for isElement utility function.

Good addition. Importing the isElement type predicate from xmlUtils will help improve type safety in this file.


137-137: Replaced direct nodeType check with isElement utility function.

Good refactoring. Using isElement(node) instead of directly checking against NODETYPE.ELEMENT makes the code more readable and type-safe, while ensuring TypeScript properly narrows down the node type inside the conditional block.

packages/core/src/serialization/codecs/RootChangeCodec.ts (4)

20-21: Great import refactoring.

Replacing the direct import of NODETYPE with the isElement utility function helps improve type safety and code readability.


54-54: Improved type checking with isElement.

Using the isElement utility function instead of manually checking nodeType === NODETYPE.ELEMENT makes the code more readable and type-safe. The function serves as a type predicate that properly narrows down the type.


62-62: Enhanced null safety with optional chaining.

Using optional chaining (?.) for parentNode access improves code safety by gracefully handling potential null/undefined values, preventing runtime errors.


68-68: Enhanced null safety with optional chaining.

Similar to the earlier change, this optional chaining operator provides better null safety when accessing parentNode before calling removeChild.

packages/core/src/util/domUtils.ts (3)

88-88: Modernized code with optional chaining and nullish coalescing.

Replacing the conditional check with optional chaining (?.) and nullish coalescing (??) operators makes the code more concise and readable while maintaining the same functionality.


265-265: Updated documentation reference.

Updating the JSDoc comment to reference {@link NODETYPE.ELEMENT} instead of {@link Constants#NODETYPE_ELEMENT} makes the documentation more accurate and consistent with the code.


287-287: Improved API reference in documentation.

Changing the reference from document.importNode to {@link Document.importNode} in the documentation provides a better and more consistent JSDoc link to the standard DOM API.

packages/core/src/serialization/codecs/StylesheetCodec.ts (7)

25-25: Good import consolidation.

Importing isElement utility instead of using NODETYPE directly aligns with the PR's goal to simplify type management.


157-158: Improved loop conditions and type safety.

The changes make the code more concise by:

  1. Using a truthy check for entry instead of explicit null comparison
  2. Using the isElement function for type checking instead of directly comparing nodeType

This enhances readability while maintaining the same functionality.


159-159: Non-null assertion is appropriately used.

Adding the non-null assertion operator (!) on getAttribute('as') makes sense here since this code only executes when we've confirmed entry is an Element, and the attribute is required for the code to function properly.


165-165: Simplified truthy check.

Changing from text != null && text.length > 0 to simply text is a good simplification as empty strings are falsy in JavaScript, making the code more concise.


168-168: Removed unnecessary type casting.

Good removal of the explicit type casting to Element since the isElement check already confirms the type.


171-171: Appropriate use of non-null assertion with explanatory comment.

Adding the non-null assertion (!) with an explanatory comment clarifies why it's safe to use - the isNumeric check already ensures the value is not null.


166-166:

❓ Verification inconclusive

Security concern with eval usage.

While not changed in this PR, the use of eval() poses a security risk, especially if processing untrusted data.

The static analysis has flagged this line. Consider replacing eval() with a safer alternative or ensuring that the input is properly sanitized before evaluation.


🏁 Script executed:

#!/bin/bash
# Check if there are any existing safeguards for eval usage
rg -A 5 -B 5 "allowEval" --glob "*.ts"

Length of output: 14426


Security Review – Verify Handling of eval() in StylesheetCodec

The static analysis correctly flagged the use of eval() in the stylesheet codec. We’ve verified that this usage is gated by the global flag StylesheetCodec.allowEval (which is set to true by default) and that similar patterns exist elsewhere in the repository. However, this design still carries a significant security risk if untrusted data ever reaches these code paths. Please ensure that one of the following actions is taken:

  • Confirm that inputs processed by eval() are strictly sanitized and come from trusted sources.
  • Consider replacing eval() with a safer alternative to avoid the potential for arbitrary code execution.
  • Reevaluate whether enabling allowEval by default is appropriate, especially in contexts where user input might be processed.
🧰 Tools
🪛 Biome (1.9.4)

[error] 166-166: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

packages/core/src/serialization/codecs/ChildChangeCodec.ts (6)

20-21: Good import refactoring.

Replacing the direct import of NODETYPE with the isElement utility function is consistent with the PR's goal to simplify type management.


97-97: Improved type checking.

Using the isElement utility function instead of manually checking nodeType === NODETYPE.ELEMENT enhances code readability and type safety.


108-108: Simplified loop condition.

Using a simple truthy check while (tmp) instead of the explicit while (tmp != null) makes the code more concise without changing functionality.


111-111: Consistent type checking pattern.

Using isElement(tmp) here maintains consistency with the pattern established throughout the codebase, making the code more maintainable.


117-117: Appropriate use of non-null assertion.

The non-null assertion on getAttribute('id') is appropriate here as this code block only executes for elements that have ID attributes in this context.


124-124: Enhanced null safety with optional chaining.

Adding optional chaining for parentNode?.removeChild(tmp) improves code safety by gracefully handling potential null values, preventing runtime errors.

packages/core/src/serialization/ObjectCodec.ts (3)

27-27: Added import for the new isElement utility function

This import supports the simplified type checking approach by using the utility function instead of direct NODETYPE comparison.


794-794: Simplified loop condition

Changed from explicit null check (child != null) to a more concise truthy check. This maintains the same behavior since both conditions will evaluate to false when child is null or undefined.


797-797: Replaced direct nodeType check with isElement utility function

This change improves readability and provides better type safety through the type predicate in the isElement function. The function handles the null/undefined check internally, making the code more robust.

packages/core/src/view/cell/Cell.ts (4)

28-29: Added imports for isElement utility and moved UserObject type to internal-types

This change centralizes type definitions and leverages the new utility function for type checking. Moving the UserObject type to a shared location improves code organization and maintainability.


569-571: Simplified hasAttribute type check using isElement utility

The new implementation is more concise and readable. It properly handles type checking by using the isElement utility function and adds fallback with optional chaining and isNotNullish for non-Element objects.


583-583: Enhanced getAttribute with isElement type checking

Replaced the direct nodeType check with isElement for clearer type checking. Also using optional chaining for safer property access.


597-597: Improved setAttribute with isElement utility function

The condition is now simpler and more readable, using the isElement utility function for type checking instead of directly accessing nodeType property.

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 21a1cdc and 6ee8c24.

📒 Files selected for processing (11)
  • packages/core/src/serialization/Codec.ts (4 hunks)
  • packages/core/src/serialization/ObjectCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/CellCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/ChildChangeCodec.ts (3 hunks)
  • packages/core/src/serialization/codecs/RootChangeCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/StylesheetCodec.ts (2 hunks)
  • packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts (2 hunks)
  • packages/core/src/util/domUtils.ts (5 hunks)
  • packages/core/src/util/xmlUtils.ts (2 hunks)
  • packages/core/src/view/cell/Cell.ts (4 hunks)
  • packages/core/src/view/geometry/node/StencilShape.ts (4 hunks)
🚧 Files skipped from review as they are similar to previous changes (9)
  • packages/core/src/serialization/Codec.ts
  • packages/core/src/serialization/codecs/RootChangeCodec.ts
  • packages/core/src/serialization/codecs/editor/EditorToolbarCodec.ts
  • packages/core/src/serialization/codecs/CellCodec.ts
  • packages/core/src/serialization/ObjectCodec.ts
  • packages/core/src/view/geometry/node/StencilShape.ts
  • packages/core/src/view/cell/Cell.ts
  • packages/core/src/serialization/codecs/ChildChangeCodec.ts
  • packages/core/src/util/xmlUtils.ts
🧰 Additional context used
🧬 Code Definitions (1)
packages/core/src/util/domUtils.ts (1)
packages/core/src/internal-types.ts (1)
  • UserObject (21-28)
🪛 Biome (1.9.4)
packages/core/src/serialization/codecs/StylesheetCodec.ts

[error] 165-165: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

⏰ Context from checks skipped due to timeout of 90000ms (1)
  • GitHub Check: build (windows-2022)
🔇 Additional comments (9)
packages/core/src/serialization/codecs/StylesheetCodec.ts (4)

24-24: Good addition of the isElement import

The import of isElement from domUtils centralizes the type checking logic, which supports the PR objective of simplifying type management.


156-158: Improved type safety with isElement

The use of the isElement function replaces a direct nodeType comparison, providing better type safety and readability. The non-null assertion on getAttribute('as') is appropriate as it's used within a condition that ensures it exists.


164-164: Simplified conditional check

The condition has been streamlined from checking text != null && text.length > 0 to just text, which correctly handles both null/undefined and empty string cases in a more concise way.


167-170: Improved type handling with appropriate assertions

The code now leverages the earlier isElement check to simplify getting the attribute value, and the non-null assertion on parseFloat(value!) is well-justified by the isNumeric check.

packages/core/src/util/domUtils.ts (5)

18-18: Good addition of UserObject type import

The import of UserObject from internal-types is appropriate for the new isElement function parameter type.


89-89: Improved code with modern JavaScript features

The refactoring to use optional chaining and nullish coalescing operators makes the code more concise and readable while maintaining the same behavior.


266-266: Documentation improvement

Updated JSDoc to correctly reference NODETYPE.ELEMENT instead of Constants#NODETYPE_ELEMENT, which improves accuracy and consistency.


288-288: Documentation improvement

Updated JSDoc to correctly reference Document.importNode instead of document.importNode, which is more accurate as it refers to the interface method rather than a specific instance.


363-369: Well-implemented type predicate function

The new isElement function is a great addition that centralizes node type checking logic across the codebase. The implementation properly uses:

  • TypeScript type predicates (node is Element) for type narrowing
  • Optional chaining for null-safety
  • Clear documentation with appropriate visibility markers

This aligns perfectly with the PR objective to simplify type management and reduce manual type casting.

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Actionable comments posted: 0

🧹 Nitpick comments (1)
packages/core/src/util/mathUtils.ts (1)

661-661: Type predicate enhances type safety, but consider using a more specific type.

The addition of the type predicate : n is {} converts this function from a regular boolean function to a TypeScript type guard, which helps narrow down types after checks. This aligns well with the PR's goal of simplifying type management.

However, {} as a type can be confusing as it means "any non-nullable value" rather than an empty object. For better type specificity, consider:

- export const isNumeric = (n: any): n is {} => {
+ export const isNumeric = (n: any): n is number | string => {

Or even more specifically:

- export const isNumeric = (n: any): n is {} => {
+ export const isNumeric = (n: any): n is number | (string & { __numeric: true }) => {
🧰 Tools
🪛 Biome (1.9.4)

[error] 661-661: Don't use '{}' as a type.

Prefer explicitly define the object shape. '{}' means "any non-nullable value".

(lint/complexity/noBannedTypes)

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 6ee8c24 and 901f7ae.

📒 Files selected for processing (3)
  • packages/core/__tests__/util/mathUtils.test.ts (1 hunks)
  • packages/core/src/serialization/codecs/StylesheetCodec.ts (2 hunks)
  • packages/core/src/util/mathUtils.ts (1 hunks)
🧰 Additional context used
🧬 Code Definitions (2)
packages/core/__tests__/util/mathUtils.test.ts (1)
packages/core/src/util/mathUtils.ts (1)
  • isNumeric (661-667)
packages/core/src/serialization/codecs/StylesheetCodec.ts (2)
packages/core/src/util/domUtils.ts (2)
  • isElement (368-369)
  • getTextContent (88-90)
packages/core/src/util/mathUtils.ts (1)
  • isNumeric (661-667)
🪛 Biome (1.9.4)
packages/core/src/util/mathUtils.ts

[error] 661-661: Don't use '{}' as a type.

Prefer explicitly define the object shape. '{}' means "any non-nullable value".

(lint/complexity/noBannedTypes)

packages/core/src/serialization/codecs/StylesheetCodec.ts

[error] 165-165: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

🔇 Additional comments (7)
packages/core/__tests__/util/mathUtils.test.ts (1)

17-52: Excellent test coverage for the isNumeric function.

This comprehensive test suite validates the isNumeric function's behavior across various input types and edge cases, including:

  • Nullish values (null, undefined)
  • Valid numbers
  • Special values (Infinity)
  • Different string formats (empty, hex, non-numeric, large numbers)
  • Objects

The tests align perfectly with the updated function signature that now includes a type predicate.

packages/core/src/serialization/codecs/StylesheetCodec.ts (6)

24-24: Good use of helper functions for improved type safety.

Adding the import for isElement and getTextContent from domUtils aligns with the PR's goal of simplifying type management by leveraging utility functions that provide proper type narrowing.


156-158: Simplified null checks and improved type safety.

This change replaces manual node type checking with the more readable isElement utility function. This is a good improvement as:

  1. It simplifies the loop condition (while (entry) vs checking for null)
  2. The isElement function ensures TypeScript correctly narrows the type, eliminating the need for manual type casting
  3. It makes the code more maintainable by centralizing the element type-checking logic

164-164: Cleaner conditional checking.

The condition has been simplified from an explicit null and length check to a more concise truthy check. This improves readability while maintaining the same logic, as empty strings and null/undefined values will evaluate to falsy.


167-167: Simplified attribute retrieval with type safety.

This change replaces explicit type casting with a direct attribute access, relying on the fact that the isElement check above has already narrowed the type properly. This is a cleaner approach that aligns with the PR's goal of eliminating manual type casting.


170-170: Non-null assertion is now properly justified.

The use of the non-null assertion operator (!) is appropriate here since the isNumeric check guarantees that value is a valid numeric string at this point. This is a good example of leveraging TypeScript's type system effectively.


165-165: Security risk with eval() remains unchanged.

While not part of the current changes, using eval() exposes the application to security risks as flagged by the static analysis tool.

Consider refactoring to avoid using eval() entirely. Some alternatives include:

  • Using a JavaScript expression parser library
  • Implementing a restricted subset of operations that don't require eval
  • Using Function constructor with proper sanitization
- if (text && StylesheetCodec.allowEval) {
-   value = eval(text);
- } else {
+ if (text) {
+   // Parse expressions without eval, perhaps using a safer approach
+   // or restrict to known function names from a whitelist
+   value = StylesheetCodec.allowEval ? StylesheetCodec.safeEvaluate(text) : entry.getAttribute('value');
+ } else {
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🪛 Biome (1.9.4)

[error] 165-165: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

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🧹 Nitpick comments (3)
packages/core/src/serialization/codecs/StylesheetCodec.ts (3)

138-141: Similar truthy check concern for 'as' attribute

The change from explicit null check to truthy check for as could reject empty strings that might have been valid before. Additionally, the conditional assignment for style has been refactored, which looks cleaner.


155-155: Be cautious with non-null assertions

The non-null assertion (!) on entry.getAttribute('as') assumes the attribute will always exist. Given that this follows an isElement check but no explicit check for the attribute's existence, this could potentially lead to runtime errors.

Consider adding an explicit check for the attribute's existence:

-const key = entry.getAttribute('as')!;
+const key = entry.getAttribute('as');
+if (key) {
   // Proceed with the existing logic
+}

167-167: Another non-null assertion to review

The non-null assertion on parseFloat(value!) assumes the value is not null after the isNumeric check. While likely correct, explicit conditional handling might be more robust.

-value = parseFloat(value);
+value = value !== null ? parseFloat(value) : null;
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Reviewing files that changed from the base of the PR and between 901f7ae and 410ab4e.

📒 Files selected for processing (2)
  • packages/core/src/serialization/codecs/StylesheetCodec.ts (3 hunks)
  • packages/core/src/util/mathUtils.ts (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
  • packages/core/src/util/mathUtils.ts
🧰 Additional context used
🪛 Biome (1.9.4)
packages/core/src/serialization/codecs/StylesheetCodec.ts

[error] 162-162: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)

⏰ Context from checks skipped due to timeout of 90000ms (1)
  • GitHub Check: build (windows-2022)
🔇 Additional comments (6)
packages/core/src/serialization/codecs/StylesheetCodec.ts (6)

24-24: Good addition of the isElement utility function import

Adding the isElement utility function import aligns with the PR's objective of simplifying type management. This function will help narrow down Element types and eliminate the need for manual type casting throughout the code.


128-130: Consider the implications of changing from null check to truthy check

Changing from if (id != null) to if (id) simplifies the code but also changes the behavior. The truthy check will evaluate empty strings as falsy, which might not be the original intent if empty string IDs were valid.

Does your application logic allow for empty string IDs? If not, this change is appropriate.


153-155: Great use of the isElement type guard function

This is an excellent application of the new isElement type guard function, which makes the code more readable and type-safe. It replaces the previous manual type check that likely used node type constants.


161-169: Caution: Security concern with eval() persists

While not part of the current changes (as noted in past review comments), using eval() poses a security risk. According to the comments, this issue was addressed in later commits, but ensure this implementation is secure if stylesheets may contain user input.

🧰 Tools
🪛 Biome (1.9.4)

[error] 162-162: eval() exposes to security risks and performance issues.

See the MDN web docs for more details.
Refactor the code so that it doesn't need to call eval().

(lint/security/noGlobalEval)


171-173: Similar truthy check concern for 'value'

The change from explicit null check to truthy check for value could cause issues if 0 is a valid value for certain styles, as it would be treated as falsy and ignored.

Are there any style properties where numeric zero is a valid and meaningful value? If so, consider using an explicit null check instead.

-if (value) {
+if (value !== null && value !== undefined) {
  style[key] = value;
}

96-122: Documentation improvements

The documentation formatting changes make the JSDoc comments more consistent and readable. Good improvement to the code's documentation.

@tbouffard tbouffard merged commit 1253ea9 into main Mar 24, 2025
7 checks passed
@tbouffard tbouffard deleted the refactor/simplify_node_mgt_in_codecs branch March 24, 2025 15:04
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