blazor-wasm

Blazor WebAssembly standalone apps

Web Fix Cross-Origin-Opener-Policy Error in Blazor WASM Entra ID Localhost

Resolve cross-origin-opener-policy errors in Blazor WASM standalone apps with Entra ID/Azure AD authentication on localhost (https://localhost:1234). Works on Azure Static Web Apps? Switch to redirect mode or add COOP headers via web.config.

#authentication
#azure-ad
#blazor
#blazor-wasm
#entra-id
#msal

1 answer• 2 views

02/04/2026, 03:37 PM