What happens when traefik redirectregex middleware's regex does not match?

Traefik Traefik v3 (latest)
1

Will the middleware be ignored?

2

If the middleware regex matches, it will redirect, otherwise the processing will continue.

From simple Traefik example:

services:
  whoami:
    image: traefik/whoami:v1.10
    networks:
      - proxy
    labels:
      - traefik.enable=true
      - traefik.http.routers.mywhoami.rule=Host(`whoami.example.com`) || Host(`www.whoami.example.com`)
      - traefik.http.routers.mywhoami.middlewares=mywwwredirect
      - traefik.http.middlewares.mywwwredirect.redirectregex.regex=^https://www\.(.*)
      - traefik.http.middlewares.mywwwredirect.redirectregex.replacement=https://$${1}
      - traefik.http.services.mywhoami.loadbalancer.server.port=80

A single router will match "www" and non-www. "www" will be redirected, only non-www will continue to target service.

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