---
url: /commerce-klaus/packages/eslint-config-sfcc/rules/sfcc/rhino-const-conflict.md
---
# sfcc/rhino-const-conflict

Detects repeated `const` declarations in nested blocks of the same function when the identifier name is reused. Rhino treats those bindings as function-scoped and would raise a redeclaration error.

## What it checks

* Tracks `const` declarations per function
* Only reports nested-block declarations when the same name is declared as `const` elsewhere in the same function

## Fix behavior

* Rewrites the conflicting nested `const` declarations to `let`

## Why this rule exists

This is a Rhino-specific safeguard. A pattern that is legal in modern JavaScript can still fail on SFCC when nested blocks reuse the same `const` name.

## Default behavior

* Severity: `error`
* Auto-fix: yes

## Example

```js [Invalid]
if (flagA) {
  const temp = 1 // [!code error]
}

if (flagB) {
  const temp = 2 // [!code error]
}
```

```js{2,6} [Valid]
if (flagA) {
  let temp = 1
}

if (flagB) {
  let temp = 2
}
```