---
id: wiki-2026-0508-타입-가드-type-guards
title: 타입 가드(Type Guards)
category: 10_Wiki/Topics
status: duplicate
canonical_id: type-guards
duplicate_of: "[[타입_가드_(Type_Predicates)|Type Guards]]"
aliases: []
source_trust_level: A
confidence_score: 0.9
verification_status: redirected
tags: [duplicate, typescript, types, narrowing]
last_reinforced: 2026-05-10
github_commit: pending
---

# 타입 가드(Type Guards)

> **이 문서는 [[타입_가드_(Type_Predicates)|Type Guards]] 의 중복본입니다.** Canonical 문서로 redirect.

## 핵심 요약
- TypeScript type guard: 매 runtime check 가 매 compile-time type narrowing 으로 lift.
- `typeof`, `instanceof`, `in`, custom predicate (`x is T`).
- 매 modern TS 5.x: `satisfies`, discriminated union, assertion function.

## 🔗 Graph
- 부모: [[타입_가드_(Type_Predicates)|Type Guards]] (canonical)
- Adjacent: [[TypeScript]] · [[Discriminated Union]]

## 🕓 변경 이력
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | 중복 처리 — canonical 문서로 redirect |
