HTML to JSX

// Simple attribute conversion using string replacement
function htmlToJsx(html) {
  return html
    .replace(/\bclass=/g, 'className=')
    .replace(/\bfor=/g, 'htmlFor=')
    .replace(/\btabindex=/g, 'tabIndex=')
    .replace(/<!--([\s\S]*?)-->/g, '{/*$1*/}')
}

htmlToJsx('<div class="box" tabindex="0"><!-- note --></div>')
// → '<div className="box" tabIndex="0">{/* note */}</div>'

import parse from 'html-react-parser'

// Parse HTML string into React elements (handles all JSX rules)
const element = parse('<div class="card"><img src="photo.jpg" alt="Photo"></div>')
// Returns: React.createElement('div', { className: 'card' },
//   React.createElement('img', { src: 'photo.jpg', alt: 'Photo' }))

// With custom element replacement
const options = {
  replace(domNode) {
    if (domNode.name === 'img') {
      return <OptimizedImage src={domNode.attribs.src} alt={domNode.attribs.alt} />
    }
  }
}
const custom = parse('<img src="photo.jpg" alt="Photo">', options)

from bs4 import BeautifulSoup
import re

ATTR_MAP = {
    'class': 'className', 'for': 'htmlFor',
    'tabindex': 'tabIndex', 'readonly': 'readOnly',
    'maxlength': 'maxLength', 'autocomplete': 'autoComplete',
}

def html_to_jsx(html: str) -> str:
    """Convert HTML attribute names to JSX equivalents."""
    for html_attr, jsx_attr in ATTR_MAP.items():
        html = re.sub(rf'\b{html_attr}=', f'{jsx_attr}=', html)
    # Convert HTML comments to JSX comments
    html = re.sub(r'<!--(.*?)-->', r'{/*\1*/}', html)
    return html

print(html_to_jsx('<label for="email" class="field">Email</label>'))
# → '<label htmlFor="email" className="field">Email</label>'

package main

import (
    "fmt"
    "strings"
)

var attrMap = map[string]string{
    "class=":    "className=",
    "for=":      "htmlFor=",
    "tabindex=": "tabIndex=",
    "readonly":  "readOnly",
}

func htmlToJSX(html string) string {
    result := html
    for old, new := range attrMap {
        result = strings.ReplaceAll(result, old, new)
    }
    // Convert comments
    result = strings.ReplaceAll(result, "<!--", "{/*")
    result = strings.ReplaceAll(result, "-->", "*/}")
    return result
}

func main() {
    html := `<div class="wrapper"><input readonly tabindex="1"></div>`
    fmt.Println(htmlToJSX(html))
    // → <div className="wrapper"><input readOnly tabIndex="1"></div>
}