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[@salesforce/b2c-tooling-sdk](../../modules.md) / [auth](../index.md) / isPkceFallbackDisabled

# Function: isPkceFallbackDisabled()

> **isPkceFallbackDisabled**(): `boolean`

Defined in: [packages/b2c-tooling-sdk/src/auth/oauth-pkce-fallback.ts:49](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/b0472c439ca6570be5c7809783a46327d7493694/packages/b2c-tooling-sdk/src/auth/oauth-pkce-fallback.ts#L49)

Returns true when the automatic PKCE→implicit fallback is disabled via the
`SFCC_DISABLE_PKCE_FALLBACK` environment variable (any non-empty value).

## Returns

`boolean`