---
source: https://iinventedlight.com/library/notes/vue-conditional-rendering.md
title: "Vue v-if conditionally renders a block"
license: CC-BY-4.0
license_url: https://creativecommons.org/licenses/by/4.0/
source_license: "CC BY 4.0, text only (vuejs/docs); MIT (vuejs/core); prose restates cited source lines in own words"
license_family: vue-docs-ccby
attribution: "Summary by iinventedlight (AI-assisted). Sources: Vue.js docs, Conditional Rendering, CC BY 4.0, text only (vuejs/docs); Vue.js core, compiler-core vIf transform, MIT (vuejs/core). Notices: Vue.js documentation (vuejs/docs): Copyright (c) 2019-present, Yuxi (Evan) You and Vue documentation contributors; CC BY 4.0, text only (https://raw.githubusercontent.com/vuejs/docs/main/LICENSE). Vue.js core (vuejs/core): Copyright (c) 2018-present, Yuxi (Evan) You and Vue contributors; MIT (https://raw.githubusercontent.com/vuejs/core/main/LICENSE)."
author: "iinventedlight (synthesis of cited sources); text drafted with AI assistance"
date: 2026-11-10
status: published
approved_by: "Cole Withington, 2026-11-10 10:08 PT, Librarian chat widget t33s2: \"Yes, publish all 25 Django and Vue drafts\""
checked_on: 2026-11-10
as_of: 2026-11-10
confidence: medium
untested: "No Vue app was run for this note; only the fetched documentation and source files were read."
category: coding-references
topic_area: "code-web: Vue conditional rendering"
tags: [vue, v-if, v-else, compiler]
client: Librarian
sources:
  - id: S1
    title: "Conditional Rendering"
    publisher: Vue.js docs
    url: https://vuejs.org/guide/essentials/conditional.html
    accessed: 2026-11-10
    license: "CC BY 4.0"
  - id: S2
    title: "compiler-core vIf transform"
    publisher: Vue.js core source
    url: https://github.com/vuejs/core/blob/main/packages/compiler-core/src/transforms/vIf.ts
    accessed: 2026-11-10
    license: "MIT"
---
# Vue v-if conditionally renders a block

**Answer:** The `v-if` directive conditionally renders a block. The block is rendered only when the directive's expression is truthy. `v-else` can indicate an else block for that `v-if`.

## Compiler

`transformIf` uses `createStructuralDirectiveTransform` for `if`, `else`, and `else-if`. `processIf` is a target-agnostic transform used for both Client and SSR. Chained `v-if` / `else` branches are rendered at the same depth.

## See also

- [vue-template-syntax](https://iinventedlight.com/library/notes/vue-template-syntax/)
- [vue-list-rendering](https://iinventedlight.com/library/notes/vue-list-rendering/)

## Claims

- id: C1
  claim: v-if conditionally renders a block.
  source: S1
  evidence: "The directive `v-if` is used to conditionally render a block."

- id: C2
  claim: The block renders only when the directive expression is truthy.
  source: S1
  evidence: "The block will only be rendered if the directive's expression returns a truthy value."

- id: C3
  claim: v-else marks the else block for a v-if.
  source: S1
  evidence: "You can use the `v-else` directive to indicate an \"else block\" for `v-if`:"

- id: C4
  claim: The compiler treats if, else, and else-if as one structural directive family.
  source: S2
  evidence: "/^(?:if|else|else-if)$/"

## Sources

- [S1] Conditional Rendering. Vue.js docs. https://vuejs.org/guide/essentials/conditional.html . License: CC BY 4.0. Accessed 2026-11-10.

- [S2] compiler-core vIf transform. Vue.js core source. https://github.com/vuejs/core/blob/main/packages/compiler-core/src/transforms/vIf.ts . License: MIT. Accessed 2026-11-10.


License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted). Sources and notices: Vue.js documentation (vuejs/docs): Copyright (c) 2019-present, Yuxi (Evan) You and Vue documentation contributors; CC BY 4.0, text only (https://raw.githubusercontent.com/vuejs/docs/main/LICENSE). Vue.js core (vuejs/core): Copyright (c) 2018-present, Yuxi (Evan) You and Vue contributors; MIT (https://raw.githubusercontent.com/vuejs/core/main/LICENSE). Text was condensed and changed from the originals.

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