feat: Enable KaTeX

package-lock.json

@@ -39,6 +39,8 @@
 				"prettier": "^3.1.1",
 				"prettier-plugin-svelte": "^3.1.2",
 				"prettier-plugin-tailwindcss": "^0.6.5",
+				"rehype-katex-svelte": "^1.2.0",
+				"remark-math": "^3.0.0",
 				"svelte": "^4.2.7",
 				"svelte-check": "^4.0.0",
 				"tailwindcss": "^3.4.9",
@@ -1741,6 +1743,17 @@
 			"resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
 			"integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
 		},
+		"node_modules/bcp-47-match": {
+			"version": "2.0.3",
+			"resolved": "https://registry.npmjs.org/bcp-47-match/-/bcp-47-match-2.0.3.tgz",
+			"integrity": "sha512-JtTezzbAibu8G0R9op9zb3vcWZd9JF6M0xOYGPn0fNCd7wOpRB1mU2mH9T8gaBGbAAyIIVgB2G7xG0GP98zMAQ==",
+			"dev": true,
+			"license": "MIT",
+			"funding": {
+				"type": "github",
+				"url": "https://github.com/sponsors/wooorm"
+			}
+		},
 		"node_modules/binary-extensions": {
 			"version": "2.3.0",
 			"resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
@@ -1768,6 +1781,13 @@
 				"svelte": "^4.0.0 || ^5.0.0-next.118"
 			}
 		},
+		"node_modules/boolbase": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+			"integrity": "sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==",
+			"dev": true,
+			"license": "ISC"
+		},
 		"node_modules/brace-expansion": {
 			"version": "1.1.11",
 			"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -2054,6 +2074,13 @@
 				"node": ">= 8"
 			}
 		},
+		"node_modules/css-selector-parser": {
+			"version": "1.4.1",
+			"resolved": "https://registry.npmjs.org/css-selector-parser/-/css-selector-parser-1.4.1.tgz",
+			"integrity": "sha512-HYPSb7y/Z7BNDCOrakL4raGO2zltZkbeXyAd6Tg9obzix6QhzxCotdBl6VT0Dv4vZfJGVz3WL/xaEI9Ly3ul0g==",
+			"dev": true,
+			"license": "MIT"
+		},
 		"node_modules/css-tree": {
 			"version": "2.3.1",
 			"resolved": "https://registry.npmjs.org/css-tree/-/css-tree-2.3.1.tgz",
@@ -2151,6 +2178,20 @@
 			"resolved": "https://registry.npmjs.org/didyoumean/-/didyoumean-1.2.2.tgz",
 			"integrity": "sha512-gxtyfqMg7GKyhQmb056K7M3xszy/myH8w+B4RT+QXBQsvAOdc3XymqDDPHx1BgPgsdAA5SIifona89YtRATDzw=="
 		},
+		"node_modules/direction": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/direction/-/direction-2.0.1.tgz",
+			"integrity": "sha512-9S6m9Sukh1cZNknO1CWAr2QAWsbKLafQiyM5gZ7VgXHeuaoUwffKN4q6NC4A/Mf9iiPlOXQEKW/Mv/mh9/3YFA==",
+			"dev": true,
+			"license": "MIT",
+			"bin": {
+				"direction": "cli.js"
+			},
+			"funding": {
+				"type": "github",
+				"url": "https://github.com/sponsors/wooorm"
+			}
+		},
 		"node_modules/dlv": {
 			"version": "1.1.3",
 			"resolved": "https://registry.npmjs.org/dlv/-/dlv-1.1.3.tgz",
@@ -2804,6 +2845,41 @@
 				"node": ">= 0.4"
 			}
 		},
+		"node_modules/hast-util-from-string": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/hast-util-from-string/-/hast-util-from-string-2.0.0.tgz",
+			"integrity": "sha512-9JlBGWh+RXbT8PDrdwYZloN6poib8xg7Vq+LgN5TTqnaMDO0YqfX4EyZd3Myel6yIXlDsgysiRB1CTjH2K+1Dg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/hast": "^2.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-from-string/node_modules/@types/hast": {
+			"version": "2.3.10",
+			"resolved": "https://registry.npmjs.org/@types/hast/-/hast-2.3.10.tgz",
+			"integrity": "sha512-McWspRw8xx8J9HurkVBfYj0xKoE25tOFlHGdx4MJ5xORQrMGZNqJhVQWaIbm6Oyla5kYOXtDiopzKRJzEOkwJw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2"
+			}
+		},
+		"node_modules/hast-util-has-property": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/hast-util-has-property/-/hast-util-has-property-2.0.1.tgz",
+			"integrity": "sha512-X2+RwZIMTMKpXUzlotatPzWj8bspCymtXH3cfG3iQKV+wPF53Vgaqxi/eLqGck0wKq1kS9nvoB1wchbCPEL8sg==",
+			"dev": true,
+			"license": "MIT",
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
 		"node_modules/hast-util-heading-rank": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/hast-util-heading-rank/-/hast-util-heading-rank-3.0.0.tgz",
@@ -2817,6 +2893,114 @@
 				"url": "https://opencollective.com/unified"
 			}
 		},
+		"node_modules/hast-util-select": {
+			"version": "5.0.5",
+			"resolved": "https://registry.npmjs.org/hast-util-select/-/hast-util-select-5.0.5.tgz",
+			"integrity": "sha512-QQhWMhgTFRhCaQdgTKzZ5g31GLQ9qRb1hZtDPMqQaOhpLBziWcshUS0uCR5IJ0U1jrK/mxg35fmcq+Dp/Cy2Aw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/hast": "^2.0.0",
+				"@types/unist": "^2.0.0",
+				"bcp-47-match": "^2.0.0",
+				"comma-separated-tokens": "^2.0.0",
+				"css-selector-parser": "^1.0.0",
+				"direction": "^2.0.0",
+				"hast-util-has-property": "^2.0.0",
+				"hast-util-to-string": "^2.0.0",
+				"hast-util-whitespace": "^2.0.0",
+				"not": "^0.1.0",
+				"nth-check": "^2.0.0",
+				"property-information": "^6.0.0",
+				"space-separated-tokens": "^2.0.0",
+				"unist-util-visit": "^4.0.0",
+				"zwitch": "^2.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/@types/hast": {
+			"version": "2.3.10",
+			"resolved": "https://registry.npmjs.org/@types/hast/-/hast-2.3.10.tgz",
+			"integrity": "sha512-McWspRw8xx8J9HurkVBfYj0xKoE25tOFlHGdx4MJ5xORQrMGZNqJhVQWaIbm6Oyla5kYOXtDiopzKRJzEOkwJw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/hast-util-to-string": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/hast-util-to-string/-/hast-util-to-string-2.0.0.tgz",
+			"integrity": "sha512-02AQ3vLhuH3FisaMM+i/9sm4OXGSq1UhOOCpTLLQtHdL3tZt7qil69r8M8iDkZYyC0HCFylcYoP+8IO7ddta1A==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/hast": "^2.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/hast-util-whitespace": {
+			"version": "2.0.1",
+			"resolved": "https://registry.npmjs.org/hast-util-whitespace/-/hast-util-whitespace-2.0.1.tgz",
+			"integrity": "sha512-nAxA0v8+vXSBDt3AnRUNjyRIQ0rD+ntpbAp4LnPkumc5M9yUbSMa4XDU9Q6etY4f1Wp4bNgvc1yjiZtsTTrSng==",
+			"dev": true,
+			"license": "MIT",
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/unist-util-is": {
+			"version": "5.2.1",
+			"resolved": "https://registry.npmjs.org/unist-util-is/-/unist-util-is-5.2.1.tgz",
+			"integrity": "sha512-u9njyyfEh43npf1M+yGKDGVPbY/JWEemg5nH05ncKPfi+kBbKBJoTdsogMu33uhytuLlv9y0O7GH7fEdwLdLQw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/unist-util-visit": {
+			"version": "4.1.2",
+			"resolved": "https://registry.npmjs.org/unist-util-visit/-/unist-util-visit-4.1.2.tgz",
+			"integrity": "sha512-MSd8OUGISqHdVvfY9TPhyK2VdUrPgxkUtWSuMHF6XAAFuL4LokseigBnZtPnJMu+FbynTkFNnFlyjxpVKujMRg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2.0.0",
+				"unist-util-is": "^5.0.0",
+				"unist-util-visit-parents": "^5.1.1"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
+		"node_modules/hast-util-select/node_modules/unist-util-visit-parents": {
+			"version": "5.1.3",
+			"resolved": "https://registry.npmjs.org/unist-util-visit-parents/-/unist-util-visit-parents-5.1.3.tgz",
+			"integrity": "sha512-x6+y8g7wWMyQhL1iZfhIPhDAs7Xwbn9nRosDXl7qoPTSCy0yNxnKc+hWokFifWQIDGi154rdUqKvbCa4+1kLhg==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2.0.0",
+				"unist-util-is": "^5.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
 		"node_modules/hast-util-to-html": {
 			"version": "9.0.3",
 			"resolved": "https://registry.npmjs.org/hast-util-to-html/-/hast-util-to-html-9.0.3.tgz",
@@ -3088,6 +3272,33 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/katex": {
+			"version": "0.16.11",
+			"resolved": "https://registry.npmjs.org/katex/-/katex-0.16.11.tgz",
+			"integrity": "sha512-RQrI8rlHY92OLf3rho/Ts8i/XvjgguEjOkO1BEXcU3N8BqPpSzBNwV/G0Ukr+P/l3ivvJUE/Fa/CwbS6HesGNQ==",
+			"dev": true,
+			"funding": [
+				"https://opencollective.com/katex",
+				"https://github.com/sponsors/katex"
+			],
+			"license": "MIT",
+			"dependencies": {
+				"commander": "^8.3.0"
+			},
+			"bin": {
+				"katex": "cli.js"
+			}
+		},
+		"node_modules/katex/node_modules/commander": {
+			"version": "8.3.0",
+			"resolved": "https://registry.npmjs.org/commander/-/commander-8.3.0.tgz",
+			"integrity": "sha512-OkTL9umf+He2DZkUq8f8J9of7yL6RJKI24dVITBmNfZBmri9zYZQrKkuXiKhyfPSu8tUhnVBB1iKXevvnlR4Ww==",
+			"dev": true,
+			"license": "MIT",
+			"engines": {
+				"node": ">= 12"
+			}
+		},
 		"node_modules/keyv": {
 			"version": "4.5.4",
 			"resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",
@@ -3576,6 +3787,12 @@
 				"node": ">=0.10.0"
 			}
 		},
+		"node_modules/not": {
+			"version": "0.1.0",
+			"resolved": "https://registry.npmjs.org/not/-/not-0.1.0.tgz",
+			"integrity": "sha512-5PDmaAsVfnWUgTUbJ3ERwn7u79Z0dYxN9ErxCpVJJqe2RK0PJ3z+iFUxuqjwtlDDegXvtWoxD/3Fzxox7tFGWA==",
+			"dev": true
+		},
 		"node_modules/npm-run-path": {
 			"version": "5.3.0",
 			"resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-5.3.0.tgz",
@@ -3603,6 +3820,19 @@
 				"url": "https://github.com/sponsors/sindresorhus"
 			}
 		},
+		"node_modules/nth-check": {
+			"version": "2.1.1",
+			"resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.1.1.tgz",
+			"integrity": "sha512-lqjrjmaOoAnWfMmBPL+XNnynZh2+swxiX3WUE0s4yEHI6m+AwrK2UZOimIRl3X/4QctVqS8AiZjFqyOGrMXb/w==",
+			"dev": true,
+			"license": "BSD-2-Clause",
+			"dependencies": {
+				"boolbase": "^1.0.0"
+			},
+			"funding": {
+				"url": "https://github.com/fb55/nth-check?sponsor=1"
+			}
+		},
 		"node_modules/object-assign": {
 			"version": "4.1.1",
 			"resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -4247,6 +4477,43 @@
 			"integrity": "sha512-r/AadFO7owAq1QJVeZ/nq9jNS1vyZt+6t1p/E59B56Rn2GCya+gr1KSyOzNL/er+r+B7phv5jG2xU2Nz1YkmJg==",
 			"license": "MIT"
 		},
+		"node_modules/rehype-katex-svelte": {
+			"version": "1.2.0",
+			"resolved": "https://registry.npmjs.org/rehype-katex-svelte/-/rehype-katex-svelte-1.2.0.tgz",
+			"integrity": "sha512-3mAa0J7LgMfaoU3oj9XLBIn5H/MyvWcOQcItoWhww/sABkcLpY73WsAs5mwH0c6cwYDYwJKaVVl2vNuL3wokeA==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"hast-util-from-string": "^2.0.0",
+				"hast-util-select": "^5.0.5",
+				"hast-util-to-string": "^2.0.0",
+				"katex": "^0.16.7"
+			}
+		},
+		"node_modules/rehype-katex-svelte/node_modules/@types/hast": {
+			"version": "2.3.10",
+			"resolved": "https://registry.npmjs.org/@types/hast/-/hast-2.3.10.tgz",
+			"integrity": "sha512-McWspRw8xx8J9HurkVBfYj0xKoE25tOFlHGdx4MJ5xORQrMGZNqJhVQWaIbm6Oyla5kYOXtDiopzKRJzEOkwJw==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/unist": "^2"
+			}
+		},
+		"node_modules/rehype-katex-svelte/node_modules/hast-util-to-string": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/hast-util-to-string/-/hast-util-to-string-2.0.0.tgz",
+			"integrity": "sha512-02AQ3vLhuH3FisaMM+i/9sm4OXGSq1UhOOCpTLLQtHdL3tZt7qil69r8M8iDkZYyC0HCFylcYoP+8IO7ddta1A==",
+			"dev": true,
+			"license": "MIT",
+			"dependencies": {
+				"@types/hast": "^2.0.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
 		"node_modules/rehype-slug": {
 			"version": "6.0.0",
 			"resolved": "https://registry.npmjs.org/rehype-slug/-/rehype-slug-6.0.0.tgz",
@@ -4279,6 +4546,17 @@
 				"url": "https://jaywcjlove.github.io/#/sponsor"
 			}
 		},
+		"node_modules/remark-math": {
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/remark-math/-/remark-math-3.0.0.tgz",
+			"integrity": "sha512-1ptXVKQaxexoS1pywvbtoRofKenkulyWa7trXUh2LR5NCdzmqfUlM/aA8qyke7h63BGMFXVjPNjOZmD8oWkKDg==",
+			"dev": true,
+			"license": "MIT",
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/unified"
+			}
+		},
 		"node_modules/remark-toc": {
 			"version": "9.0.0",
 			"resolved": "https://registry.npmjs.org/remark-toc/-/remark-toc-9.0.0.tgz",

package.json

@@ -34,6 +34,8 @@
 		"prettier": "^3.1.1",
 		"prettier-plugin-svelte": "^3.1.2",
 		"prettier-plugin-tailwindcss": "^0.6.5",
+		"rehype-katex-svelte": "^1.2.0",
+		"remark-math": "^3.0.0",
 		"svelte": "^4.2.7",
 		"svelte-check": "^4.0.0",
 		"tailwindcss": "^3.4.9",

src/app.html

@@ -5,6 +5,7 @@
 		<link rel="icon" href="%sveltekit.assets%/favicon.svg" />
 		<meta name="viewport" content="width=device-width, initial-scale=1" />
 		%sveltekit.head%
+		<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css" integrity="sha384-AfEj0r4/OFrOo5t7NnNe46zW/tFgW6x/bCJG8FqQCEo3+Aro6EYUG4+cU+KJWu/X" crossorigin="anonymous">
 	</head>
 	<body data-sveltekit-preload-data="hover" class="font-serif">
 		<div style="display: contents">%sveltekit.body%</div>

src/content/post/placeholder1.md

@@ -7,7 +7,7 @@ series: ["placeholder"]
 ---
 # 1st Level Heading
 
-Here is some placeholder text
+Here is some placeholder text. Here is some **bold text**.
 
 ## 2nd Level Heading
 

src/content/post/the-perfect-math-class.md

@@ -16,3 +16,13 @@ theorem perfect_number_theorem (n: Nat),
 
 > :>WARNING
 > The proof is elusive!
+
+Some KaTeX: $a^n + b^n = c^n$.
+
+$$
+\Gamma(z) = \int_0^\infty e^{-t} t^{z-1}\,\mathrm dz
+$$
+
+$$
+\vec z^{(l+1)} = \mat M\vec z^{(l)} + \vec b
+$$

svelte.config.js

@@ -7,6 +7,8 @@ import relativeImages from 'mdsvex-relative-images'
 import remarkToc from 'remark-toc'
 import rehypeSlug from 'rehype-slug'
 import { getHighlighter } from 'shiki'
+import rehypeKatexSvelte from "rehype-katex-svelte";
+import remarkMath from 'remark-math'
 
 const contentDir = process.env?.CHRYSOBLOG_CONTENT ?? "src/content";
 
@@ -28,6 +30,15 @@ const highlightingThemes = {
    light: 'vitesse-light',
    dark: 'vitesse-dark',
 };
+const katexOptions = {
+   macros: {
+      "\\Nat": "\\mathbb N",
+      "\\Complex": "\\mathbb C",
+      "\\vec": "\\boldsymbol",
+      "\\mat": "\\boldsymbol",
+      "\\rv": "\\mathrm",
+   },
+};
 
 const themes = Object.keys(highlightingThemes).map(function(k){ return highlightingThemes[k] });
 const highlighter = await getHighlighter({
@@ -47,8 +58,10 @@ const config = {
             remarkAlert,
             relativeImages,
             [remarkToc, {tight: true}],
+            remarkMath,
          ],
          rehypePlugins: [
+            [ rehypeKatexSvelte, katexOptions ],
             rehypeSlug,
          ],
          highlight: {