vtcode 0.128.2

A Rust-based terminal coding agent with modular architecture supporting multiple LLM providers
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id: avoid-jsx-short-circuit
language: tsx
severity: error
message: Use a ternary instead of `&&` for conditional JSX rendering.
note: |
  `{cond && <Elem />}` renders the falsy value (e.g. `0`) when `cond` is
  falsy instead of rendering nothing. This is a common React bug because
  `0` is a valid React child but invisible in the DOM. Use a ternary to
  guarantee nothing renders on the falsy branch: `{cond ? <Elem /> : null}`.
  This rule only fires inside JSX expressions to avoid false positives on
  plain boolean logic.
rule:
  all:
    - pattern: $COND && $JSX
    - inside:
        kind: jsx_expression
        stopBy: end
    - not:
        inside:
          kind: jsx_attribute
          stopBy: end
constraints:
  JSX:
    any:
      - kind: jsx_element
      - kind: jsx_self_closing_element
fix: $COND ? $JSX : null
files:
  - "**/*.tsx"
  - "**/*.jsx"
  - "!node_modules/**"
  - "!dist/**"
  - "!build/**"