--- title: "Regex based redirects for Static Web Apps" url: https://daily.dev/posts/regex-based-redirects-for-static-web-apps-ucw1lqdb9 source_url: https://www.damirscorner.com/blog/posts/20260612-RegexBasedRedirectsForStaticWebApps.html type: article source: "Damir's Corner" published: 2026-06-12T07:50:17.204Z updated: 2026-06-12T07:50:43.994Z tags: ["typescript", "azure-functions"] reading_time: 3 upvotes: 3 comments: 1 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Regex based redirects for Static Web Apps **[Damir's Corner](https://daily.dev/sources/damirscorner)** · 3 min read · 3 upvotes · 1 comments ## Summary When migrating a blog to Azure Static Web Apps, the built-in route configuration lacks support for regex-based redirects with back-references. A workaround uses an Azure Function as a navigation fallback: unresolved paths are routed to the function via `navigationFallback` in `staticwebapp.config.json`, the original URL is read from the `x-ms-original-url` header, and JavaScript's `String.replace()` with regex capturing groups handles the redirect logic. Redirect rules are stored in a JSON file and matched at runtime, returning 301 redirects on match or a custom 404 page otherwise. A sample TypeScript project with GitHub Actions deployment workflow is provided. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Apex domain redirect for Azure Static Web Apps](https://daily.dev/posts/apex-domain-redirect-for-azure-static-web-apps-q75vf5ssp) · Damir's Corner · 0 upvotes · 0 comments --- Tags: [#typescript](https://daily.dev/tags/typescript), [#azure-functions](https://daily.dev/tags/azure-functions) [View this post on daily.dev](https://daily.dev/posts/regex-based-redirects-for-static-web-apps-ucw1lqdb9)