Disqus 'on-click' for your Hugo generated pages | https://duchnovsky.com/2020/11/disqus-on-click-for-hugo/

disqus.html

<!-- Adapted/developed by pduchnovsky, https://duchnovsky.com/2020/11/disqus-on-click-for-hugo/ -->
{{- if and (not (eq (.Site.DisqusShortname | default "") "")) (eq (.Params.disableComments | default false) false) -}}
  {{- if .Site.Params.disqusOnClick -}}
  {{- $pc := .Site.Config.Privacy.Disqus -}}
    {{- if not $pc.Disable -}}
      {{- if .Site.DisqusShortname -}}
        <section id="disqus" style="text-align: center">
          <button
            class="disqus-comment-count"
            data-disqus-identifier="{{ .File.UniqueID }}"
            id="show-comments"
            onclick="disqus();return false;"
          >
            Comments
          </button>
          <div id="disqus_thread"></div>
          <script>
            window.onload = function () {
              if (["localhost", "127.0.0.1"].indexOf(window.location.hostname) != -1) {
                document.getElementById("disqus_thread").innerHTML =
                  "Disqus comments not available when the website is previewed locally.";
                document.getElementById("show-comments").style.display = "none";
                return;
              }
            };
        
            var disqus_loaded = false;
            var disqus_config = function () {
              this.page.identifier = "{{ .File.UniqueID }}";
              this.page.title = "{{ .Title }}";
              this.page.url = "{{ .Permalink | html }}";
            };
            function disqus() {
              if (!disqus_loaded) {
                disqus_loaded = true;
        
                var e = document.createElement("script");
                e.type = "text/javascript";
                e.async = true;
                e.src = "//{{ .Site.DisqusShortname }}.disqus.com/embed.js";
                (
                  document.getElementsByTagName("head")[0] ||
                  document.getElementsByTagName("body")[0]
                ).appendChild(e);
        
                document.getElementById("show-comments").style.display = "none";
              }
            }
        
            var hash = window.location.hash.substr(1);
            if (hash.length > 8) {
              if (hash.substring(0, 8) == "comment-") {
                disqus();
              }
            }
        
            if (
              /bot|google|baidu|bing|msn|duckduckgo|slurp|yandex/i.test(
                navigator.userAgent
              )
            ) {
              disqus();
            }
          </script>
          <script
            id="dsq-count-scr"
            src="https://{{ .Site.DisqusShortname }}.disqus.com/count.js"
            async
          ></script>
          <noscript>
            Please enable JavaScript to view the
            <a href="https://disqus.com/?ref_noscript"> comments powered by Disqus. </a>
          </noscript>
          <a href="https://disqus.com" class="dsq-brlink">
            powered by <span class="logo-disqus">Disqus</span>
          </a>
        </section>      
      {{- end -}}
    {{- end -}}
  {{- else -}}
    {{ template "_internal/disqus.html" . }}
  {{- end -}}
{{- end -}}

style.scss

button {
  color: white !important;
  background-color: #1565c0;
  border: none;
  border-radius: 5px;
  padding: 10px 20px;
  margin: 6px 4px;
  font-size: 1.6rem;
  transition-duration: 0.4s;
  cursor: pointer;
}

button:hover {
  background-color: #42a5f5;
}