HTMLParser is a lightweight HTML parsing engine written entirely in Swift. It converts raw HTML strings into a structured tree of tokens and nodes, making it ideal for building custom renderers (like Browser-SwiftUI) without relying on WebKit.

• Tokenization: Converts raw HTML text into tag and text tokens.

• Node Tree Construction: Parses tokens into a structured DOM-like node tree.

• Supports:

  • Opening tags (<p>, <h1>, etc.)
  • Closing tags (</p>)
  • Self-closing tags (<img />)
  • Text nodes
  • Nesting and hierarchy

• Designed to be extensible and lightweight.

let html = """
<h1>Welcome</h1>
<p>This is a <b>bold</b> move.</p>
"""

let tokens = HTMLTokenizer.tokenize(html)
let nodes = HTMLParser.parse(tokens)

for node in nodes {
    print(node.description)
}

TagNode(tag: "h1", children: [TextNode("Welcome")])
TagNode(tag: "p", children: [
    TextNode("This is a "),
    TagNode(tag: "b", children: [TextNode("bold")]),
    TextNode(" move.")
])

• HTMLTokenizer: Breaks input into tokens (start tag, end tag, text, self-closing).
• HTMLNode: Represents elements like tags and text.
• HTMLParser: Builds a tree of HTMLNodes from tokens using a stack-based approach.