Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/micromark-extension-gfm-strikethrough/dev/index.d.ts

@@ -0,0 +1,30 @@
+export {gfmStrikethroughHtml} from './lib/html.js'
+export {gfmStrikethrough} from './lib/syntax.js'
+
+/**
+ * Configuration (optional).
+ */
+export interface Options {
+  /**
+   * Whether to support strikethrough with a single tilde (default: `true`).
+   *
+   * Single tildes work on github.com, but are technically prohibited by the
+   * GFM spec.
+   */
+  singleTilde?: boolean | null | undefined
+}
+
+/**
+ * Augment.
+ */
+declare module 'micromark-util-types' {
+  /**
+   * Token types.
+   */
+  interface TokenTypeMap {
+    strikethroughSequence: 'strikethroughSequence'
+    strikethroughSequenceTemporary: 'strikethroughSequenceTemporary'
+    strikethrough: 'strikethrough'
+    strikethroughText: 'strikethroughText'
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/dev/index.js

@@ -0,0 +1,3 @@
+// Note: more types exposed from `index.d.ts`.
+export {gfmStrikethroughHtml} from './lib/html.js'
+export {gfmStrikethrough} from './lib/syntax.js'

node_modules/micromark-extension-gfm-strikethrough/dev/lib/html.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+/**
+ * Create an HTML extension for `micromark` to support GFM strikethrough when
+ * serializing to HTML.
+ *
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions`, to
+ *   support GFM strikethrough when serializing to HTML.
+ */
+export function gfmStrikethroughHtml(): HtmlExtension;
+import type { HtmlExtension } from 'micromark-util-types';

node_modules/micromark-extension-gfm-strikethrough/dev/lib/html.js

@@ -0,0 +1,26 @@
+/**
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+
+/**
+ * Create an HTML extension for `micromark` to support GFM strikethrough when
+ * serializing to HTML.
+ *
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions`, to
+ *   support GFM strikethrough when serializing to HTML.
+ */
+export function gfmStrikethroughHtml() {
+  return {
+    enter: {
+      strikethrough() {
+        this.tag('<del>')
+      }
+    },
+    exit: {
+      strikethrough() {
+        this.tag('</del>')
+      }
+    }
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/dev/lib/syntax.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Create an extension for `micromark` to enable GFM strikethrough syntax.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration.
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions`, to
+ *   enable GFM strikethrough syntax.
+ */
+export function gfmStrikethrough(options?: Options | null | undefined): Extension;
+import type { Options } from 'micromark-extension-gfm-strikethrough';
+import type { Extension } from 'micromark-util-types';

node_modules/micromark-extension-gfm-strikethrough/dev/lib/syntax.js

@@ -0,0 +1,183 @@
+/**
+ * @import {Options} from 'micromark-extension-gfm-strikethrough'
+ * @import {Event, Extension, Resolver, State, Token, TokenizeContext, Tokenizer} from 'micromark-util-types'
+ */
+
+import {ok as assert} from 'devlop'
+import {splice} from 'micromark-util-chunked'
+import {classifyCharacter} from 'micromark-util-classify-character'
+import {resolveAll} from 'micromark-util-resolve-all'
+import {codes, constants, types} from 'micromark-util-symbol'
+
+/**
+ * Create an extension for `micromark` to enable GFM strikethrough syntax.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration.
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions`, to
+ *   enable GFM strikethrough syntax.
+ */
+export function gfmStrikethrough(options) {
+  const options_ = options || {}
+  let single = options_.singleTilde
+  const tokenizer = {
+    name: 'strikethrough',
+    tokenize: tokenizeStrikethrough,
+    resolveAll: resolveAllStrikethrough
+  }
+
+  if (single === null || single === undefined) {
+    single = true
+  }
+
+  return {
+    text: {[codes.tilde]: tokenizer},
+    insideSpan: {null: [tokenizer]},
+    attentionMarkers: {null: [codes.tilde]}
+  }
+
+  /**
+   * Take events and resolve strikethrough.
+   *
+   * @type {Resolver}
+   */
+  function resolveAllStrikethrough(events, context) {
+    let index = -1
+
+    // Walk through all events.
+    while (++index < events.length) {
+      // Find a token that can close.
+      if (
+        events[index][0] === 'enter' &&
+        events[index][1].type === 'strikethroughSequenceTemporary' &&
+        events[index][1]._close
+      ) {
+        let open = index
+
+        // Now walk back to find an opener.
+        while (open--) {
+          // Find a token that can open the closer.
+          if (
+            events[open][0] === 'exit' &&
+            events[open][1].type === 'strikethroughSequenceTemporary' &&
+            events[open][1]._open &&
+            // If the sizes are the same:
+            events[index][1].end.offset - events[index][1].start.offset ===
+              events[open][1].end.offset - events[open][1].start.offset
+          ) {
+            events[index][1].type = 'strikethroughSequence'
+            events[open][1].type = 'strikethroughSequence'
+
+            /** @type {Token} */
+            const strikethrough = {
+              type: 'strikethrough',
+              start: Object.assign({}, events[open][1].start),
+              end: Object.assign({}, events[index][1].end)
+            }
+
+            /** @type {Token} */
+            const text = {
+              type: 'strikethroughText',
+              start: Object.assign({}, events[open][1].end),
+              end: Object.assign({}, events[index][1].start)
+            }
+
+            // Opening.
+            /** @type {Array<Event>} */
+            const nextEvents = [
+              ['enter', strikethrough, context],
+              ['enter', events[open][1], context],
+              ['exit', events[open][1], context],
+              ['enter', text, context]
+            ]
+
+            const insideSpan = context.parser.constructs.insideSpan.null
+
+            if (insideSpan) {
+              // Between.
+              splice(
+                nextEvents,
+                nextEvents.length,
+                0,
+                resolveAll(insideSpan, events.slice(open + 1, index), context)
+              )
+            }
+
+            // Closing.
+            splice(nextEvents, nextEvents.length, 0, [
+              ['exit', text, context],
+              ['enter', events[index][1], context],
+              ['exit', events[index][1], context],
+              ['exit', strikethrough, context]
+            ])
+
+            splice(events, open - 1, index - open + 3, nextEvents)
+
+            index = open + nextEvents.length - 2
+            break
+          }
+        }
+      }
+    }
+
+    index = -1
+
+    while (++index < events.length) {
+      if (events[index][1].type === 'strikethroughSequenceTemporary') {
+        events[index][1].type = types.data
+      }
+    }
+
+    return events
+  }
+
+  /**
+   * @this {TokenizeContext}
+   * @type {Tokenizer}
+   */
+  function tokenizeStrikethrough(effects, ok, nok) {
+    const previous = this.previous
+    const events = this.events
+    let size = 0
+
+    return start
+
+    /** @type {State} */
+    function start(code) {
+      assert(code === codes.tilde, 'expected `~`')
+
+      if (
+        previous === codes.tilde &&
+        events[events.length - 1][1].type !== types.characterEscape
+      ) {
+        return nok(code)
+      }
+
+      effects.enter('strikethroughSequenceTemporary')
+      return more(code)
+    }
+
+    /** @type {State} */
+    function more(code) {
+      const before = classifyCharacter(previous)
+
+      if (code === codes.tilde) {
+        // If this is the third marker, exit.
+        if (size > 1) return nok(code)
+        effects.consume(code)
+        size++
+        return more
+      }
+
+      if (size < 2 && !single) return nok(code)
+      const token = effects.exit('strikethroughSequenceTemporary')
+      const after = classifyCharacter(code)
+      token._open =
+        !after || (after === constants.attentionSideAfter && Boolean(before))
+      token._close =
+        !before || (before === constants.attentionSideAfter && Boolean(after))
+      return ok(code)
+    }
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/index.d.ts

@@ -0,0 +1,24 @@
+export {gfmStrikethroughHtml} from './lib/html.js'
+export {gfmStrikethrough} from './lib/syntax.js'
+
+/**
+ * Configuration (optional).
+ */
+export interface Options {
+  /**
+   * Whether to support strikethrough with a single tilde (default: `true`).
+   *
+   * Single tildes work on github.com, but are technically prohibited by the
+   * GFM spec.
+   */
+  singleTilde?: boolean | null | undefined
+}
+
+declare module 'micromark-util-types' {
+  interface TokenTypeMap {
+    strikethroughSequence: 'strikethroughSequence'
+    strikethroughSequenceTemporary: 'strikethroughSequenceTemporary'
+    strikethrough: 'strikethrough'
+    strikethroughText: 'strikethroughText'
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/index.js

@@ -0,0 +1,3 @@
+// Note: more types exposed from `index.d.ts`.
+export { gfmStrikethroughHtml } from './lib/html.js';
+export { gfmStrikethrough } from './lib/syntax.js';

node_modules/micromark-extension-gfm-strikethrough/lib/html.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+/**
+ * Create an HTML extension for `micromark` to support GFM strikethrough when
+ * serializing to HTML.
+ *
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions`, to
+ *   support GFM strikethrough when serializing to HTML.
+ */
+export function gfmStrikethroughHtml(): HtmlExtension;
+import type { HtmlExtension } from 'micromark-util-types';

node_modules/micromark-extension-gfm-strikethrough/lib/html.js

@@ -0,0 +1,26 @@
+/**
+ * @import {HtmlExtension} from 'micromark-util-types'
+ */
+
+/**
+ * Create an HTML extension for `micromark` to support GFM strikethrough when
+ * serializing to HTML.
+ *
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions`, to
+ *   support GFM strikethrough when serializing to HTML.
+ */
+export function gfmStrikethroughHtml() {
+  return {
+    enter: {
+      strikethrough() {
+        this.tag('<del>');
+      }
+    },
+    exit: {
+      strikethrough() {
+        this.tag('</del>');
+      }
+    }
+  };
+}

node_modules/micromark-extension-gfm-strikethrough/lib/syntax.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Create an extension for `micromark` to enable GFM strikethrough syntax.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration.
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions`, to
+ *   enable GFM strikethrough syntax.
+ */
+export function gfmStrikethrough(options?: Options | null | undefined): Extension;
+import type { Options } from 'micromark-extension-gfm-strikethrough';
+import type { Extension } from 'micromark-util-types';

node_modules/micromark-extension-gfm-strikethrough/lib/syntax.js

@@ -0,0 +1,142 @@
+/**
+ * @import {Options} from 'micromark-extension-gfm-strikethrough'
+ * @import {Event, Extension, Resolver, State, Token, TokenizeContext, Tokenizer} from 'micromark-util-types'
+ */
+
+import { splice } from 'micromark-util-chunked';
+import { classifyCharacter } from 'micromark-util-classify-character';
+import { resolveAll } from 'micromark-util-resolve-all';
+/**
+ * Create an extension for `micromark` to enable GFM strikethrough syntax.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration.
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions`, to
+ *   enable GFM strikethrough syntax.
+ */
+export function gfmStrikethrough(options) {
+  const options_ = options || {};
+  let single = options_.singleTilde;
+  const tokenizer = {
+    name: 'strikethrough',
+    tokenize: tokenizeStrikethrough,
+    resolveAll: resolveAllStrikethrough
+  };
+  if (single === null || single === undefined) {
+    single = true;
+  }
+  return {
+    text: {
+      [126]: tokenizer
+    },
+    insideSpan: {
+      null: [tokenizer]
+    },
+    attentionMarkers: {
+      null: [126]
+    }
+  };
+
+  /**
+   * Take events and resolve strikethrough.
+   *
+   * @type {Resolver}
+   */
+  function resolveAllStrikethrough(events, context) {
+    let index = -1;
+
+    // Walk through all events.
+    while (++index < events.length) {
+      // Find a token that can close.
+      if (events[index][0] === 'enter' && events[index][1].type === 'strikethroughSequenceTemporary' && events[index][1]._close) {
+        let open = index;
+
+        // Now walk back to find an opener.
+        while (open--) {
+          // Find a token that can open the closer.
+          if (events[open][0] === 'exit' && events[open][1].type === 'strikethroughSequenceTemporary' && events[open][1]._open &&
+          // If the sizes are the same:
+          events[index][1].end.offset - events[index][1].start.offset === events[open][1].end.offset - events[open][1].start.offset) {
+            events[index][1].type = 'strikethroughSequence';
+            events[open][1].type = 'strikethroughSequence';
+
+            /** @type {Token} */
+            const strikethrough = {
+              type: 'strikethrough',
+              start: Object.assign({}, events[open][1].start),
+              end: Object.assign({}, events[index][1].end)
+            };
+
+            /** @type {Token} */
+            const text = {
+              type: 'strikethroughText',
+              start: Object.assign({}, events[open][1].end),
+              end: Object.assign({}, events[index][1].start)
+            };
+
+            // Opening.
+            /** @type {Array<Event>} */
+            const nextEvents = [['enter', strikethrough, context], ['enter', events[open][1], context], ['exit', events[open][1], context], ['enter', text, context]];
+            const insideSpan = context.parser.constructs.insideSpan.null;
+            if (insideSpan) {
+              // Between.
+              splice(nextEvents, nextEvents.length, 0, resolveAll(insideSpan, events.slice(open + 1, index), context));
+            }
+
+            // Closing.
+            splice(nextEvents, nextEvents.length, 0, [['exit', text, context], ['enter', events[index][1], context], ['exit', events[index][1], context], ['exit', strikethrough, context]]);
+            splice(events, open - 1, index - open + 3, nextEvents);
+            index = open + nextEvents.length - 2;
+            break;
+          }
+        }
+      }
+    }
+    index = -1;
+    while (++index < events.length) {
+      if (events[index][1].type === 'strikethroughSequenceTemporary') {
+        events[index][1].type = "data";
+      }
+    }
+    return events;
+  }
+
+  /**
+   * @this {TokenizeContext}
+   * @type {Tokenizer}
+   */
+  function tokenizeStrikethrough(effects, ok, nok) {
+    const previous = this.previous;
+    const events = this.events;
+    let size = 0;
+    return start;
+
+    /** @type {State} */
+    function start(code) {
+      if (previous === 126 && events[events.length - 1][1].type !== "characterEscape") {
+        return nok(code);
+      }
+      effects.enter('strikethroughSequenceTemporary');
+      return more(code);
+    }
+
+    /** @type {State} */
+    function more(code) {
+      const before = classifyCharacter(previous);
+      if (code === 126) {
+        // If this is the third marker, exit.
+        if (size > 1) return nok(code);
+        effects.consume(code);
+        size++;
+        return more;
+      }
+      if (size < 2 && !single) return nok(code);
+      const token = effects.exit('strikethroughSequenceTemporary');
+      const after = classifyCharacter(code);
+      token._open = !after || after === 2 && Boolean(before);
+      token._close = !before || before === 2 && Boolean(after);
+      return ok(code);
+    }
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/license

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2020 Titus Wormer <tituswormer@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/micromark-extension-gfm-strikethrough/package.json

@@ -0,0 +1,129 @@
+{
+  "name": "micromark-extension-gfm-strikethrough",
+  "version": "2.1.0",
+  "description": "micromark extension to support GFM strikethrough",
+  "license": "MIT",
+  "keywords": [
+    "micromark",
+    "micromark-extension",
+    "strikethrough",
+    "strike",
+    "through",
+    "del",
+    "delete",
+    "deletion",
+    "gfm",
+    "markdown",
+    "unified"
+  ],
+  "repository": "micromark/micromark-extension-gfm-strikethrough",
+  "bugs": "https://github.com/micromark/micromark-extension-gfm-strikethrough/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/unified"
+  },
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "files": [
+    "dev/",
+    "lib/",
+    "index.d.ts",
+    "index.js"
+  ],
+  "exports": {
+    "development": "./dev/index.js",
+    "default": "./index.js"
+  },
+  "dependencies": {
+    "devlop": "^1.0.0",
+    "micromark-util-chunked": "^2.0.0",
+    "micromark-util-classify-character": "^2.0.0",
+    "micromark-util-resolve-all": "^2.0.0",
+    "micromark-util-symbol": "^2.0.0",
+    "micromark-util-types": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.0.0",
+    "c8": "^10.0.0",
+    "create-gfm-fixtures": "^1.0.0",
+    "micromark": "^4.0.0",
+    "micromark-build": "^2.0.0",
+    "prettier": "^3.0.0",
+    "remark-cli": "^12.0.0",
+    "remark-preset-wooorm": "^10.0.0",
+    "tape": "^5.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^5.0.0",
+    "xo": "^0.58.0"
+  },
+  "scripts": {
+    "prepack": "npm run build && npm run format",
+    "build": "tsc --build --clean && tsc --build && type-coverage && micromark-build",
+    "format": "remark . -qfo && prettier . -w --log-level warn && xo --fix",
+    "test-api-prod": "node --conditions production test/index.js",
+    "test-api-dev": "node --conditions development test/index.js",
+    "test-api": "npm run test-api-dev && npm run test-api-prod",
+    "test-coverage": "c8 --100 --reporter lcov npm run test-api",
+    "test": "npm run build && npm run format && npm run test-coverage"
+  },
+  "prettier": {
+    "bracketSpacing": false,
+    "semi": false,
+    "singleQuote": true,
+    "tabWidth": 2,
+    "trailingComma": "none",
+    "useTabs": false
+  },
+  "remarkConfig": {
+    "plugins": [
+      "remark-preset-wooorm"
+    ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "ignoreCatch": true,
+    "strict": true
+  },
+  "xo": {
+    "prettier": true,
+    "rules": {
+      "logical-assignment-operators": "off",
+      "max-depth": "off",
+      "unicorn/prefer-at": "off"
+    },
+    "overrides": [
+      {
+        "files": "**/*.ts",
+        "rules": {
+          "@typescript-eslint/array-type": [
+            "error",
+            {
+              "default": "generic"
+            }
+          ],
+          "@typescript-eslint/ban-types": [
+            "error",
+            {
+              "extendDefaults": true
+            }
+          ],
+          "@typescript-eslint/consistent-type-definitions": [
+            "error",
+            "interface"
+          ]
+        }
+      },
+      {
+        "files": "test/**/*.js",
+        "rules": {
+          "no-await-in-loop": 0
+        }
+      }
+    ]
+  }
+}

node_modules/micromark-extension-gfm-strikethrough/readme.md

@@ -0,0 +1,304 @@
+# micromark-extension-gfm-strikethrough
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][size-badge]][size]
+[![Sponsors][sponsors-badge]][collective]
+[![Backers][backers-badge]][collective]
+[![Chat][chat-badge]][chat]
+
+[micromark][] extensions to support GFM [strikethrough][].
+
+## Contents
+
+* [What is this?](#what-is-this)
+* [When to use this](#when-to-use-this)
+* [Install](#install)
+* [Use](#use)
+* [API](#api)
+  * [`gfmStrikethrough(options?)`](#gfmstrikethroughoptions)
+  * [`gfmStrikethroughHtml()`](#gfmstrikethroughhtml)
+  * [`Options`](#options)
+* [Authoring](#authoring)
+* [HTML](#html)
+* [CSS](#css)
+* [Syntax](#syntax)
+* [Types](#types)
+* [Compatibility](#compatibility)
+* [Security](#security)
+* [Related](#related)
+* [Contribute](#contribute)
+* [License](#license)
+
+## What is this?
+
+This package contains extensions that add support for strikethrough as enabled
+by GFM to [`micromark`][micromark].
+
+## When to use this
+
+This project is useful when you want to support strikethrough in markdown.
+
+You can use these extensions when you are working with [`micromark`][micromark].
+To support all GFM features, use
+[`micromark-extension-gfm`][micromark-extension-gfm].
+
+When you need a syntax tree, you can combine this package with
+[`mdast-util-gfm-strikethrough`][mdast-util-gfm-strikethrough].
+
+All these packages are used [`remark-gfm`][remark-gfm], which focusses on making
+it easier to transform content by abstracting these internals away.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 16+), install with [npm][]:
+
+```sh
+npm install micromark-extension-gfm-strikethrough
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {gfmStrikethrough, gfmStrikethroughHtml} from 'https://esm.sh/micromark-extension-gfm-strikethrough@2'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {gfmStrikethrough, gfmStrikethroughHtml} from 'https://esm.sh/micromark-extension-gfm-strikethrough@2?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {micromark} from 'micromark'
+import {
+  gfmStrikethrough,
+  gfmStrikethroughHtml
+} from 'micromark-extension-gfm-strikethrough'
+
+const output = micromark('Some ~strikethrough~.', {
+  extensions: [gfmStrikethrough()],
+  htmlExtensions: [gfmStrikethroughHtml()]
+})
+
+console.log(output)
+```
+
+Yields:
+
+```html
+<p>Some <del>strikethrough</del></p>.
+```
+
+## API
+
+This package exports the identifiers
+[`gfmStrikethrough`][api-gfm-strikethrough] and
+[`gfmStrikethroughHtml`][api-gfm-strikethrough-html].
+There is no default export.
+
+The export map supports the [`development` condition][development].
+Run `node --conditions development module.js` to get instrumented dev code.
+Without this condition, production code is loaded.
+
+### `gfmStrikethrough(options?)`
+
+Create an extension for `micromark` to enable GFM strikethrough syntax.
+
+###### Parameters
+
+* `options` ([`Options`][api-options], optional)
+  — configuration
+
+###### Returns
+
+Extension for `micromark` that can be passed in `extensions`, to
+enable GFM strikethrough syntax ([`Extension`][micromark-extension]).
+
+### `gfmStrikethroughHtml()`
+
+Create an HTML extension for `micromark` to support GFM strikethrough when
+serializing to HTML.
+
+###### Returns
+
+Extension for `micromark` that can be passed in `htmlExtensions`, to support
+GFM strikethrough when serializing to HTML
+([`HtmlExtension`][micromark-html-extension]).
+
+### `Options`
+
+Configuration (TypeScript type).
+
+###### Fields
+
+* `singleTilde` (`boolean`, default: `true`)
+  — whether to support strikethrough with a single tilde.
+  Single tildes work on github.com, but are technically prohibited by the GFM
+  spec
+
+## Authoring
+
+When authoring markdown with strikethrough, it is recommended to use two
+markers.
+While `github.com` allows single tildes too, it technically prohibits it in
+their spec.
+
+## HTML
+
+When tilde sequences match, they together relate to the `<del>` element in
+HTML.
+See [*§ 4.7.2 The `del` element*][html-del] in the HTML spec for more info.
+
+## CSS
+
+GitHub itself does not apply interesting CSS to `del` elements.
+It currently (July 2022) does change `code` in `del`.
+
+```css
+del code {
+  text-decoration: inherit;
+}
+```
+
+For the complete actual CSS see
+[`sindresorhus/github-markdown-css`][github-markdown-css].
+
+## Syntax
+
+Strikethrough sequences form with the following BNF:
+
+```bnf
+gfm_attention_sequence ::= 1*'~'
+```
+
+Sequences are matched together to form strikethrough based on which character
+they contain, how long they are, and what character occurs before and after
+each sequence.
+Otherwise they are turned into data.
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports the additional type [`Options`][api-options].
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line,
+`micromark-extension-gfm-strikethrough@^2`, compatible with Node.js 16.
+
+This package works with `micromark` version `3` and later.
+
+## Security
+
+This package is safe.
+
+## Related
+
+* [`micromark-extension-gfm`][micromark-extension-gfm]
+  — support all of GFM
+* [`mdast-util-gfm-strikethrough`][mdast-util-gfm-strikethrough]
+  — support all of GFM in mdast
+* [`mdast-util-gfm`][mdast-util-gfm]
+  — support all of GFM in mdast
+* [`remark-gfm`][remark-gfm]
+  — support all of GFM in remark
+
+## Contribute
+
+See [`contributing.md` in `micromark/.github`][contributing] for ways to get
+started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organization, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/micromark/micromark-extension-gfm-strikethrough/workflows/main/badge.svg
+
+[build]: https://github.com/micromark/micromark-extension-gfm-strikethrough/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark-extension-gfm-strikethrough.svg
+
+[coverage]: https://codecov.io/github/micromark/micromark-extension-gfm-strikethrough
+
+[downloads-badge]: https://img.shields.io/npm/dm/micromark-extension-gfm-strikethrough.svg
+
+[downloads]: https://www.npmjs.com/package/micromark-extension-gfm-strikethrough
+
+[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-extension-gfm-strikethrough
+
+[size]: https://bundlejs.com/?q=micromark-extension-gfm-strikethrough
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[collective]: https://opencollective.com/unified
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/micromark/micromark/discussions
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esmsh]: https://esm.sh
+
+[license]: license
+
+[author]: https://wooorm.com
+
+[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
+
+[support]: https://github.com/micromark/.github/blob/main/support.md
+
+[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[typescript]: https://www.typescriptlang.org
+
+[development]: https://nodejs.org/api/packages.html#packages_resolving_user_conditions
+
+[micromark]: https://github.com/micromark/micromark
+
+[micromark-html-extension]: https://github.com/micromark/micromark#htmlextension
+
+[micromark-extension]: https://github.com/micromark/micromark#syntaxextension
+
+[micromark-extension-gfm]: https://github.com/micromark/micromark-extension-gfm
+
+[mdast-util-gfm-strikethrough]: https://github.com/syntax-tree/mdast-util-gfm-strikethrough
+
+[mdast-util-gfm]: https://github.com/syntax-tree/mdast-util-gfm
+
+[remark-gfm]: https://github.com/remarkjs/remark-gfm
+
+[strikethrough]: https://github.github.com/gfm/#strikethrough-extension-
+
+[github-markdown-css]: https://github.com/sindresorhus/github-markdown-css
+
+[html-del]: https://html.spec.whatwg.org/multipage/edits.html#the-del-element
+
+[api-gfm-strikethrough]: #gfmstrikethroughoptions
+
+[api-gfm-strikethrough-html]: #gfmstrikethroughhtml
+
+[api-options]: #options