Coding Practices

Code Organization

• Single responsibility: Each source file should have a clear, focused scope/purpose
• Split large files: Break files when they become large or handle too many concerns
• Type separation: When using TypeScript, Always separate types and interfaces into types.ts or types/*.ts
• Constants extraction: Move constants to a dedicated constants.js file

Runtime Environment

• Prefer isomorphic code: Write runtime-agnostic code that works in Node, browser, and workers whenever possible
• Clear runtime indicators: When code is environment-specific, add a comment at the top of the file:

// @env node
// @env browser

TypeScript

• Explicit return types: Declare return types explicitly when possible
• Avoid complex inline types: Extract complex types into dedicated type or interface declarations

Comments

• Avoid unnecessary comments: Code should be self-explanatory
• Explain "why" not "how": Comments should describe the reasoning or intent, not what the code does

Testing (Vitest)

• Test files: foo.js → foo.test.js (same directory)
• Use describe/it API (not test)
• Use toMatchSnapshot for complex outputs
• Use toMatchFileSnapshot with explicit path for language-specific snapshots

App Development

Framework Selection

Vue Conventions

Vue Example

<template>
  <div>{{ count }}</div>
</template>

<script setup>
const props = defineProps({
  count: {
    type: Number,
    default: 0
  }
})

const emit = defineEmits(['change'])
</script>

<style lang="scss" scoped></style>