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---
name: js-early-exit
description: Early Return from Functions. Use when you need help with js early exit.
license: CC-BY-NC-SA-4.0
metadata:
risk: unknown
source: community
kind: mode
category: rules
---
## Early Return from Functions
Return early when result is determined to skip unnecessary processing.
**Incorrect (processes all items even after finding answer):**
```typescript
function validateUsers(users: User[]) {
let hasError = false;
let errorMessage = "";
for (const user of users) {
if (!user.email) {
hasError = true;
errorMessage = "Email required";
}
if (!user.name) {
hasError = true;
errorMessage = "Name required";
}
// Continues checking all users even after error found
}
return hasError ? { valid: false, error: errorMessage } : { valid: true };
}
```
**Correct (returns immediately on first error):**
```typescript
function validateUsers(users: User[]) {
for (const user of users) {
if (!user.email) {
return { valid: false, error: "Email required" };
}
if (!user.name) {
return { valid: false, error: "Name required" };
}
}
return { valid: true };
}
```
