korbit-ai[bot] commented on code in PR #35086:
URL: https://github.com/apache/superset/pull/35086#discussion_r2336369233
##########
superset-frontend/plugins/plugin-chart-echarts/src/utils/eventHandlers.ts:
##########
@@ -54,7 +54,9 @@ const getCrossFilterDataMask =
values = [value];
}
- const groupbyValues = values.map(value => labelMap[value]);
+ const groupbyValues = values
+ .map(value => labelMap[value])
+ .filter(Boolean) as string[][];
Review Comment:
### Unsafe type assertion after filtering <sub></sub>
<details>
<summary>Tell me more</summary>
###### What is the issue?
The type assertion 'as string[][]' after filter(Boolean) may lead to runtime
errors if labelMap contains non-string values.
###### Why this matters
If labelMap contains values that are truthy but not string arrays (like
numbers or objects), the type assertion will not prevent runtime errors when
the values are used.
###### Suggested change ∙ *Feature Preview*
Replace with a more specific type guard to ensure array elements are string
arrays:
```typescript
const groupbyValues = values
.map(value => labelMap[value])
.filter((value): value is string[] =>
Array.isArray(value) && value.every(item => typeof item === 'string')
);
```
###### Provide feedback to improve future suggestions
[](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/eaa85304-ad88-487c-8718-94d5bae9b035/upvote)
[](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/eaa85304-ad88-487c-8718-94d5bae9b035?what_not_true=true)
[](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/eaa85304-ad88-487c-8718-94d5bae9b035?what_out_of_scope=true)
[](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/eaa85304-ad88-487c-8718-94d5bae9b035?what_not_in_standard=true)
[](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/eaa85304-ad88-487c-8718-94d5bae9b035)
</details>
<sub>
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