@11ty/eleventy-plugin-syntaxhighlight/demo/eleventy-config.js

Prism.js based syntax highlighting for Markdown, Liquid, Nunjucks, WebC, and 11ty.js templates.

const syntaxHighlight = require("../.eleventy.js");

module.exports = function(eleventyConfig) {
  eleventyConfig.addPlugin(syntaxHighlight, {
    // alwaysWrapLineHighlights: true
    preAttributes: { tabindex: 0 }
  });

  eleventyConfig.setTemplateFormats("njk,liquid,md,css");
};