Materialize/doc/user/layouts/partials/breadcrumbs.html

<!-- Adapted from https://discourse.gohugo.io/t/snippet-partial-for-creating-breadcrumbs-uses-bootstrap-4/15426/2 -->
{{ define "breadcrumb" }}
  {{ with .Parent }}
    {{ template "breadcrumb" . }}
    {{ if not .IsHome }}&nbsp;/&nbsp;&nbsp;{{end}}<a href="{{ .RelPermalink }}">{{ if .IsHome }}Home{{ else }}{{.Title}}{{ end }}</a>
  {{ end }}
{{ end }}
{{ if not .Params.suppress_breadcrumb }}
  {{ if not .IsHome }}
      <!-- This cannot be and'ed with the condition above because
      `.Parent.IsHome` is nil pointer on the home page -->
      {{if not .Parent.IsHome}}
          <div class="breadcrumb">
              {{ template "breadcrumb" . }}
          </div>
      {{ end }}
  {{ end }}
{{ end }}