How to include dynamic configmap and secrets in helmfile

Question

I am using helmfile to deploy multiple sub-charts using helmfile sync -e env command.

I am having the configmap and secretes which I need to load based on the environment.

Is there a way to load configmap and secretes based on the environment in the helmfile.

I tried to add in the

dev-configmap.yaml

  apiVersion: v1
    kind: ConfigMap
    metadata:
        name: backend
        namespace: {{ .Values.namespace }}
    data:
        NODE_ENV: {{ .Values.env }}

In helmfile.yaml

environments:
    envDefaults: &envDefaults
        values:
            - ./values/{{ .Environment.Name }}.yaml
            - kubeContext: ''
              namespace: '{{ .Environment.Name }}'
    dev:
        <<: *envDefaults
        secrets:
            - ./config/secrets/dev.yaml
            - ./config/configmap/dev.yaml

Is there a way to import configmap and secrets (Not encrypted) YAML dynamically based on the environment in helmfile?