From 1f472e5c2cb52be4fdda06ba47e05f7b95eaeb9a Mon Sep 17 00:00:00 2001
From: Chris Wanstrath <chris@ozmm.org>
Date: Fri, 12 Dec 2025 06:58:24 -0800
Subject: [PATCH] use non-validating HTML formatter

---
 package.json          |   4 +-
 src/html-formatter.js | 141 ++++++++++++++++++++++++++++++++++++++++++
 src/index.tsx         |   4 +-
 3 files changed, 145 insertions(+), 4 deletions(-)
 create mode 100644 src/html-formatter.js

diff --git a/package.json b/package.json
index 58ef4f9..807f976 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "hono": "^4.10.4",
-    "kleur": "^4.1.5",
-    "prettier": "^3.7.3"
+    "hype": "^0.0.3",
+    "kleur": "^4.1.5"
   }
 }
\ No newline at end of file
diff --git a/src/html-formatter.js b/src/html-formatter.js
new file mode 100644
index 0000000..0c4cfb8
--- /dev/null
+++ b/src/html-formatter.js
@@ -0,0 +1,141 @@
+// HTML Formatter
+// https://github.com/uznam8x/html-formatter
+// MIT License
+
+const single = [
+  'br', 'hr', 'img', 'input', 'meta', 'link',
+  'col', 'base', 'param', 'track', 'source', 'wbr',
+  'command', 'keygen', 'area', 'embed', 'menuitem'
+];
+
+const closing = function(el) {
+  el = el.replace(/<([a-zA-Z\-0-9]+)[^>]*>/g, function(match, capture) {
+    if (single.indexOf(capture) > -1) {
+      return (match.substring(0, match.length - 1) + ' />').replace(/\/\s\//g, '/');
+    }
+    return match.replace(/[\s]?\/>/g, '></' + capture + '>');
+  });
+  return el;
+};
+
+const entity = function(el) {
+  el = el.replace(/(<textarea[^>]*>)\n\s+/g, '$1');
+  el = el.replace(/\s+<\/textarea>/g, '</textarea>');
+  el = el.replace(/<textarea[^>]*>((.|\n)*?)<\/textarea>/g, function(match, capture) {
+    return match.replace(capture, function(match) {
+      return match
+        .replace(/</g, '&lt;')
+        .replace(/>/g, '&gt;')
+        .replace(/\//g, '&#47;')
+        .replace(/"/g, '&#34;')
+        .replace(/'/g, '&#39;')
+        .replace(/\n/g, '&#13;')
+        .replace(/%/g, '&#37;')
+        .replace(/\{/g, '&#123;')
+        .replace(/\}/g, '&#125;')
+        .replace(/\s/g, '&nbsp;');
+    });
+  });
+  return el;
+};
+
+const minify = function(el)  {
+  return el
+    .replace(/\n|\t/g, '')
+    .replace(/[a-z]+="\s*"/ig, '')
+    .replace(/>\s+</g, '><')
+    .replace(/\s+/g, ' ')
+    .replace(/\s>/g, '>')
+    .replace(/>\s/g, '>')
+    .replace(/\s</g, '<')
+    .replace(/class=["']\s/g, function(match) {
+      return match.replace(/\s/g, '');
+    })
+    ;
+};
+
+const convert = {
+  comment: [],
+  line: []
+};
+
+const comment = function (el) {
+  convert.comment = [];
+
+  el = el.replace(/(<!--(.|\n)*?-->)/g, function (match) {
+    convert.comment.push(match);
+    return '<!-- [#!# : ' + (convert.comment.length - 1) + ' : #!#] -->';
+  });
+  return el;
+};
+
+const line = function (el) {
+  convert.line = [];
+  let i = -1;
+  el = el.replace(/<[^>]*>/g, function (match) {
+    convert.line.push(match);
+    i++;
+    return '\n[#-# : ' + i + ' : ' + match + ' : #-#]\n';
+  });
+  el = el.replace(/\n\n/g, '\n');
+  return el;
+};
+
+const tidy = function (el) {
+  let tab = '';
+  convert.line.forEach(function (source, index) {
+    el = el.replace('[#-# : ' + index + ' : ' + source + ' : #-#]', function (match) {
+      const prevLine = '[#-# : ' + (index - 1) + ' : ' + convert.line[index - 1] + ' : #-#]';
+      tab += '\t';
+      let remove = 0;
+      if (index === 0) remove++;
+      if (match.indexOf('#-# : ' + (index) + ' : </') > -1) remove++;
+      if (prevLine.indexOf('<!doctype') > -1) remove++;
+      if (prevLine.indexOf('<!--') > -1) remove++;
+      if (prevLine.indexOf('/> : #-#') > -1) remove++;
+      if (prevLine.indexOf('#-# : ' + (index - 1) + ' : </') > -1) remove++;
+      if (match.indexOf('<!--') > -1) {
+        match = match.replace('<!-- [#!# :', '<!-- [#!# %' + (tab.length - remove) + '% :');
+      }
+      tab = tab.substring(0, tab.length - remove);
+      return tab + match.replace('[#-# : ' + index + ' : ', '').replace(' : #-#]', '');
+    });
+  });
+
+
+  el = el.replace(/>[^<]*?[^><\/\s][^<]*?<\/|>\s+[^><\s]|<script[^>]*>\s+<\/script>|<(\w+)>\s+<\/(\w+)|<(\w+)[^>]*>\s<\/(\w+)>|<([\w\-]+)[^>]*[^\/]>\s+<\/([\w\-]+)>/g, function(match) {
+    return match.replace(/\n|\t/g, '');
+  })
+
+  const generateTab = function(cnt){
+    let t = '';
+    for (let c = 0; c < cnt; c++) {
+      t += '\t';
+    }
+    return t;
+  }
+  convert.comment.forEach(function (source, index) {
+    el = el.replace(new RegExp('<!--[^>]*' + index + ' : #!#] -->', 'g'), function (match) {
+      const cnt = /%(\d+)%/g.exec(match);
+      const t = generateTab(cnt[1]);
+      return source.replace(/\n/g, '\n'+t);
+    });
+  });
+
+  return el.substring(1, el.length - 1);
+};
+
+const render = function (el, opt) {
+  el = closing(el);
+  el = comment(el);
+  el = entity(el);
+  el = minify(el);
+  el = line(el);
+  el = tidy(el);
+
+  return el;
+};
+
+// Export for ES modules
+export { closing, entity, minify, render };
+export default render;
diff --git a/src/index.tsx b/src/index.tsx
index 789cf96..ed6280b 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,5 +1,5 @@
 import { join } from 'path'
-import prettier from 'prettier'
+import { render as formatHTML } from './html-formatter'
 import { type Context, Hono, type Schema, type Env } from 'hono'
 import { serveStatic } from 'hono/bun'
 import color from 'kleur'
@@ -78,7 +78,7 @@ export class Hype<
 
         if (c.res.headers.get('content-type')?.includes('text/html')) {
           const html = await c.res.text()
-          const formatted = await prettier.format(html, { parser: 'html' })
+          const formatted = formatHTML(html)
           c.res = new Response(formatted, c.res)
         }
       })