marker.css

/* Language marker */

[class*='language-']:before {
  position: absolute;
  top: 0.4em;
  right: 0.8em;
  z-index: 2;
  opacity: var(--prism-marker-opacity);
  font-size: var(--prism-marker-font-size);
  color: var(--prism-marker-color);
}

[class~='language-html']:before,
[class~='language-markup']:before {
  content: 'html';
}

[class~='language-md']:before,
[class~='language-markdown']:before {
  content: 'md';
}

[class~='language-css']:before {
  content: 'css';
}

[class~='language-sass']:before {
  content: 'sass';
}

[class~='language-scss']:before {
  content: 'scss';
}

[class~='language-less']:before {
  content: 'less';
}

[class~='language-stylus']:before {
  content: 'styl';
}

[class~='language-js']:before,
[class~='language-javascript']:before {
  content: 'js';
}

[class~='language-ts']:before,
[class~='language-typescript']:before {
  content: 'ts';
}

[class~='language-json']:before {
  content: 'json';
}

[class~='language-rb']:before,
[class~='language-ruby']:before {
  content: 'rb';
}

[class~='language-py']:before,
[class~='language-python']:before {
  content: 'py';
}

[class~='language-sh']:before,
[class~='language-bash']:before {
  content: 'sh';
}

[class~='language-php']:before {
  content: 'php';
}

[class~='language-go']:before {
  content: 'go';
}

[class~='language-rust']:before {
  content: 'rust';
}

[class~='language-java']:before {
  content: 'java';
}

[class~='language-c']:before {
  content: 'c';
}

[class~='language-yaml']:before {
  content: 'yaml';
}

[class~='language-vue']:before {
  content: 'vue';
}

[class~='language-dockerfile']:before {
  content: 'dockerfile';
}