[#814,tutorial,docs][xl]: add initial version of the second tutorial, rename basic-example to learn-example, clean up learn-example

examples/learn-example/lib/applyFullWidthDirective.tsx

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+export default function applyFullWidthDirective({
+  Component,
+  defaultWFull = true,
+}) {
+  return (props) => {
+    const newProps = { ...props };
+
+    let newClassName = newProps.className || "";
+    if (newProps.fullWidth === true) {
+      newClassName += " w-[90vw] ml-[calc(50%-45vw)] max-w-none";
+    } else if (defaultWFull) {
+      //  So that charts and tables will have the
+      //  same width as the text content, but images
+      //  can have its width set using the width prop
+      newClassName += " w-full";
+    }
+    newProps.className = newClassName;
+
+    return <Component {...newProps} />;
+  };
+}

examples/learn-example/lib/loadData.tsx

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+export default async function loadData(url: string) {
+  const response = await fetch(url)
+  const data = await response.text()
+  return data
+}

examples/learn-example/lib/markdown.js

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+import matter from "gray-matter";
+import mdxmermaid from "mdx-mermaid";
+import { h } from "hastscript";
+import remarkCallouts from "@flowershow/remark-callouts";
+import remarkEmbed from "@flowershow/remark-embed";
+import remarkGfm from "remark-gfm";
+import remarkMath from "remark-math";
+import remarkSmartypants from "remark-smartypants";
+import remarkToc from "remark-toc";
+import remarkWikiLink from "@flowershow/remark-wiki-link";
+import rehypeAutolinkHeadings from "rehype-autolink-headings";
+import rehypeKatex from "rehype-katex";
+import rehypeSlug from "rehype-slug";
+import rehypePrismPlus from "rehype-prism-plus";
+
+import { serialize } from "next-mdx-remote/serialize";
+
+/**
+ * Parse a markdown or MDX file to an MDX source form + front matter data
+ *
+ * @source: the contents of a markdown or mdx file
+ * @format: used to indicate to next-mdx-remote which format to use (md or mdx)
+ * @returns: { mdxSource: mdxSource, frontMatter: ...}
+ */
+const parse = async function (source, format) {
+  const { content, data, excerpt } = matter(source, {
+    excerpt: (file, options) => {
+      // Generate an excerpt for the file
+      file.excerpt = file.content.split("\n\n")[0];
+    },
+  });
+
+  const mdxSource = await serialize(
+    { value: content, path: format },
+    {
+      // Optionally pass remark/rehype plugins
+      mdxOptions: {
+        remarkPlugins: [
+          remarkEmbed,
+          remarkGfm,
+          [remarkSmartypants, { quotes: false, dashes: "oldschool" }],
+          remarkMath,
+          remarkCallouts,
+          remarkWikiLink,
+          [
+            remarkToc,
+            {
+              heading: "Table of contents",
+              tight: true,
+            },
+          ],
+          [mdxmermaid, {}],
+        ],
+        rehypePlugins: [
+          rehypeSlug,
+          [
+            rehypeAutolinkHeadings,
+            {
+              properties: { className: 'heading-link' },
+              test(element) {
+                return (
+                  ["h2", "h3", "h4", "h5", "h6"].includes(element.tagName) &&
+                  element.properties?.id !== "table-of-contents" &&
+                  element.properties?.className !== "blockquote-heading"
+                );
+              },
+              content() {
+                return [
+                  h(
+                    "svg",
+                    {
+                      xmlns: "http:www.w3.org/2000/svg",
+                      fill: "#ab2b65",
+                      viewBox: "0 0 20 20",
+                      className: "w-5 h-5",
+                    },
+                    [
+                      h("path", {
+                        fillRule: "evenodd",
+                        clipRule: "evenodd",
+                        d: "M9.493 2.853a.75.75 0 00-1.486-.205L7.545 6H4.198a.75.75 0 000 1.5h3.14l-.69 5H3.302a.75.75 0 000 1.5h3.14l-.435 3.148a.75.75 0 001.486.205L7.955 14h2.986l-.434 3.148a.75.75 0 001.486.205L12.456 14h3.346a.75.75 0 000-1.5h-3.14l.69-5h3.346a.75.75 0 000-1.5h-3.14l.435-3.147a.75.75 0 00-1.486-.205L12.045 6H9.059l.434-3.147zM8.852 7.5l-.69 5h2.986l.69-5H8.852z",
+                      }),
+                    ]
+                  ),
+                ];
+              },
+            },
+          ],
+          [rehypeKatex, { output: "mathml" }],
+          [rehypePrismPlus, { ignoreMissing: true }],
+        ],
+        format,
+      },
+      scope: data,
+    }
+  );
+
+  return {
+    mdxSource: mdxSource,
+    frontMatter: data,
+    excerpt,
+  };
+};
+
+export default parse;

examples/learn-example/lib/parseCsv.ts

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+import papa from "papaparse";
+
+const parseCsv = (csv) => {
+  csv = csv.trim();
+  const rawdata = papa.parse(csv, { header: true });
+  const cols = rawdata.meta.fields.map((r, i) => {
+    return { key: r, name: r };
+  });
+
+  return {
+    rows: rawdata.data,
+    fields: cols,
+  };
+};
+
+export default parseCsv;