Fix readme and python3.9 union

README.md

@@ -32,14 +32,14 @@ Emmetify converts complex HTML structures into concise Emmet notation. For examp
 ```
 Becomes:
 ```
-div.container>header.header>nav.nav>ul.nav-list>li.nav-item>a[href=#]
+div.container>header.header>nav.nav>ul.nav-list>li.nav-item>a[href=#]{Link}
 ```
 
 Using the [OpenAI Tokenizer](https://platform.openai.com/tokenizer), we can see this simple transformation reduces token count from:
 - HTML: 59 tokens
-- Emmet: 20 tokens
+- Emmet: 22 tokens
 
-That's 66% fewer tokens while preserving all structural information! And this is just with default settings.
+That's 63% fewer tokens while preserving all structural information! And this is just with default settings.
 
 You can achieve even higher compression rates (up to 90%, or even more depending on the HTML structure) by using advanced configuration options:
 - Removing unnecessary tags
@@ -137,6 +137,11 @@ response = llm.chat.completions.create(
 )
 ```
 
+## Backlog 📝
+
+- [x] Add support for HTML
+- [ ] Add examples
+
 ## Supported Formats 📊
 
 - ✅ HTML

emmetify/converters/html_converter.py

@@ -1,3 +1,4 @@
+from typing import Union
 from emmetify.config.base_config import EmmetifierConfig
 from emmetify.config.html_config import HtmlAttributesPriority
 from emmetify.converters.base_converter import BaseConverter
@@ -152,7 +153,7 @@ def _node_to_emmet(self, node: HtmlNode) -> str:
         return "".join(parts)
 
     def _build_emmet(
-        self, node_pool: HtmlNodePool, node_data: str | HtmlNode, level: int = 0
+        self, node_pool: HtmlNodePool, node_data: Union[str, HtmlNode], level: int = 0
     ) -> str:
         """Recursively build Emmet notation with optional indentation."""
         indent = " " * (self.config.indent_size * level) if self.config.indent else ""
@@ -170,7 +171,7 @@ def _build_emmet(
 
         # Get children nodes
         children_nodes: list[HtmlNode] = []
-        direct_text_child_node: HtmlNode | None = None
+        direct_text_child_node: Union[HtmlNode, None] = None
         for child_index, child_id in enumerate(node.children_ids):
             child_node = node_pool.get_node(child_id)
             is_first_text_child = (

emmetify/emmetifier.py

@@ -1,3 +1,5 @@
+from typing import Union
+
 from emmetify.config import EmmetifierConfig
 from emmetify.converters import get_converter
 from emmetify.parsers import get_parser
@@ -8,7 +10,7 @@ class Emmetifier:
     def __init__(
         self,
         format: SupportedFormats = DefaultFormat,
-        config: EmmetifierConfig | dict | None = None,
+        config: Union[EmmetifierConfig, dict, None] = None,
     ):
         self.config = EmmetifierConfig.model_validate(config) if config else EmmetifierConfig()