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Biome showcase #13

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@nimratcoderabbit nimratcoderabbit commented Jul 14, 2025

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Summary by CodeRabbit

  • New Features

    • Introduced a new greeting function that displays a message with a provided name.
  • Tests

    • Added a new test file to demonstrate greeting functionality and asynchronous operations.

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coderabbitai bot commented Jul 14, 2025

📝 Walkthrough

Walkthrough

A new TypeScript file named test.ts appears, introducing a greet function that logs a personalized greeting. The file also declares several variables, including an unused one, and attempts to reassign a constant. It iterates over an array, making asynchronous fetch calls for each item, and invokes the greet function.

Changes

File(s) Change Summary
test.ts Added with a greet function, variable and constant declarations, an array, async forEach loop, and a function call.

Poem

In test.ts a greeting is spun,
Async fetches for each item run.
A constant resists a cheeky rewrite,
While greet("world") brings joy and light.
Unused numbers quietly rest,
TypeScript’s quirks put to the test!
🌍✨

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coderabbitai bot commented Jul 14, 2025

✅ Actions performed

Full review triggered.

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Full review triggered.

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Actionable comments posted: 4

📜 Review details

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

📥 Commits

Reviewing files that changed from the base of the PR and between ef04b8d and e69c37b.

📒 Files selected for processing (1)
  • test.ts (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.ts

Instructions used from:

Sources:
⚙️ CodeRabbit Configuration File

🪛 Biome (1.9.4)
test.ts

[error] 7-8: Can't assign x because it's a constant

This is where the variable is defined as constant

Unsafe fix: Replace const with let if you assign it to a new value.

(lint/correctness/noConstAssign)

🔇 Additional comments (2)
test.ts (2)

1-3: LGTM! Clean function implementation.

The greet function correctly accepts a string parameter and logs a greeting message.


15-15: LGTM! Function call works correctly.

The function call properly invokes the greet function with a string argument.

console.log("Hello, " + name)
}

let unused = 123
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🛠️ Refactor suggestion

Remove unused variable.

The unused variable is declared but never used in the code.

-let unused = 123
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
let unused = 123
🤖 Prompt for AI Agents
In test.ts at line 5, there is a variable named 'unused' declared but never
used. Remove the declaration of this unused variable to clean up the code and
avoid unnecessary declarations.

Comment on lines +7 to +8
const x = 1
x = 2
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⚠️ Potential issue

Fix const reassignment error.

You cannot reassign a value to a constant. This will cause a compilation error.

-const x = 1
-x = 2
+let x = 1
+x = 2
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
const x = 1
x = 2
let x = 1
x = 2
🧰 Tools
🪛 Biome (1.9.4)

[error] 7-8: Can't assign x because it's a constant

This is where the variable is defined as constant

Unsafe fix: Replace const with let if you assign it to a new value.

(lint/correctness/noConstAssign)

🤖 Prompt for AI Agents
In test.ts around lines 7 to 8, the code attempts to reassign a value to a
constant variable 'x', which causes a compilation error. To fix this, change the
declaration of 'x' from 'const' to 'let' if reassignment is needed, or avoid
reassigning 'x' altogether if it should remain constant.


const items = [1, 2, 3]
items.forEach(async item => {
await fetch(`/api/${item}`)
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🛠️ Refactor suggestion

Add error handling to fetch calls.

The fetch call lacks error handling, which could cause unhandled promise rejections.

-  await fetch(`/api/${item}`)
+  await fetch(`/api/${item}`).catch(error => {
+    console.error(`Failed to fetch /api/${item}:`, error)
+  })
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
await fetch(`/api/${item}`)
await fetch(`/api/${item}`).catch(error => {
console.error(`Failed to fetch /api/${item}:`, error)
})
🤖 Prompt for AI Agents
In test.ts at line 12, the fetch call lacks error handling which can lead to
unhandled promise rejections. Wrap the fetch call in a try-catch block or use
.catch() to handle any errors that may occur during the fetch operation. Ensure
that any errors are logged or handled appropriately to prevent the application
from crashing.

Comment on lines +10 to +13
const items = [1, 2, 3]
items.forEach(async item => {
await fetch(`/api/${item}`)
})
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🛠️ Refactor suggestion

Replace forEach with Promise.all for async operations.

Using forEach with async callbacks creates side effects and doesn't wait for completion. Replace with Promise.all and map for proper async handling.

-items.forEach(async item => {
-  await fetch(`/api/${item}`)
-})
+await Promise.all(items.map(async item => {
+  return fetch(`/api/${item}`)
+}))
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
const items = [1, 2, 3]
items.forEach(async item => {
await fetch(`/api/${item}`)
})
const items = [1, 2, 3]
await Promise.all(items.map(async item => {
return fetch(`/api/${item}`)
}))
🤖 Prompt for AI Agents
In test.ts around lines 10 to 13, the code uses forEach with an async callback,
which does not wait for the async operations to complete. Replace the forEach
loop with Promise.all combined with map to run all fetch calls concurrently and
properly await their completion. This ensures all async operations finish before
proceeding.

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