js-early-exit

Return early when result is determined to skip unnecessary processing.

Skills
Web development
1

What it does and how to use it

A skill that teaches Claude Code to do web development tasks well. It is packaged knowledge the model uses whenever it is relevant.

Install the skill (command above).
In Claude Code, describe what you need - the skill turns on by itself when the context fits.
No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/js-early-exit && curl -fsSL https://doutorai.pt/data/lib/skills__js-early-exit.md -o .claude/skills/js-early-exit/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

---
title: Early Return from Functions
impact: LOW-MEDIUM
impactDescription: avoids unnecessary computation
tags: javascript, functions, optimization, early-return
---

## 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 = t

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