Using Collapsable Codeblock with Shortcode

[sahashirshendu]

I was trying to use collapsable code block with a shortcode and a css file in my website but cannot get the code highlighting to work. Any kind of help is greatly appreciated. [These are mostly taken from: https://github.com/panr/hugo-theme-hello-friend]
Shortcode (layouts/shortcodes/code.html):

{{ $id := delimit (shuffle (seq 1 9)) "" }}

{{ if .Get "language" }}
  <div class="collapsable-code">
    <input id="{{ .Get "id" | default $id }}" type="checkbox" {{ if ( eq ( .Get "isCollapsed" ) "true" ) -}} checked {{- end }} />
    <label for="{{ .Get "id" | default $id }}">
      <span class="collapsable-code__language">{{ .Get "language" }}</span>
      {{ if .Get "title" }}<span class="collapsable-code__title">{{ .Get "title" | markdownify }}</span>{{ end }}
      <span class="collapsable-code__toggle" data-label-expand="{{ .Get "expand" | default "△" }}" data-label-collapse="{{ .Get "collapse" | default "▽" }}"></span>
    </label>
    <pre {{ if .Get "language" }}class="language-{{ .Get "language" }}" {{ end }}><code>{{ .Inner | string }}</code></pre>
  </div>
{{ else }}
  {{ errorf "If you want to use the \"collapsable code\" shortcode, you need to pass a mandatory \"language\" param. The issue occured in %q (%q)" .Page.File .Page.Permalink }}
{{ end }}

SCSS (assets/scss/code.scss):

.collapsable-code {
  position: relative;
  width: 100%;
  margin: 40px 0;

  input[type="checkbox"] {
    position: absolute;
    visibility: hidden;
  }

  input[type="checkbox"]:checked {
    ~ pre,
    ~ .code-toolbar pre {
      height: 0;
      padding: 0;
      border-top: none;
    }

    ~ .code-toolbar {
      padding: 0;
      border-top: none;

      .toolbar {
        display: none;
      }
    }

    ~ label {
      border-radius: 10px;
    }

    ~ label .collapsable-code__toggle:after {
      content: attr(data-label-expand);
    }
  }

  label {
    position: relative;
    display: flex;
    justify-content: space-between;
    background: var(--card-background-selected);
    padding: 10px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    min-width: 30px;
    min-height: 30px;
    margin: 0;
    cursor: pointer;
  }

  &__title {
    flex: 1;
    color: var(--code-text-color);
    padding: 3px 10px;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
  }

  &__language {
    background: var(--code-background-color);
    color: var(--code-text-color);
    border-radius: 10px;
    padding: 3px 10px;
  }

  &__toggle {
    color: var(--code-text-color);
    font-size: 16px;
    padding: 3px 10px;

    &:after {
      content: attr(data-label-collapse);
    }
  }

  pre {
    margin-top: 0;
    border-top-left-radius: 0;
    border-top-right-radius: 0;

    &::first-line {
      line-height: 0;
    }
  }

  code {
    &::first-line {
      line-height: 0;
    }
  }

  .code-toolbar {
    margin: 0;
  }
}

[CaiJimmy]

Try replacing {{ .Inner | string }} with {{- highlight .Inner (.Get "language") -}}

(I haven't tried it.)

[sahashirshendu]

Thanks a lot! It works