Minimal gbnf for jsx-ish content

jsx.min.gbnf

## Trying to debug why this is slow

# root rule
root ::= jsxElement

# Main JSX Element
jsxElement ::=
    "<" jsxElementName jsxAttributesOpt ">" jsxChildrenOpt "</" jsxElementName ">"

# JSX Self-Closing Element
jsxSelfClosingElement ::=
    "<" jsxElementName jsxAttributesOpt "/>"

# JSX Element Name (simplified)
jsxElementName ::= "div" | "p" | "span" | "a" | "button" | "input" | "label" | "h1" | "h2" | "h3" | "h4" | "h5" | "h6"

# JSX Attributes
jsxAttributesOpt ::= (" " jsxAttribute)*
jsxAttribute ::= jsxAttributeName "=" jsxAttributeValue
jsxAttributeName ::= "className"
jsxAttributeValue ::=
    "\"" [^\"]* "\""                       # String Literal

# JSX Children
jsxChildrenOpt ::= jsxChild+
jsxChild ::=
    jsxText |
    jsxElement |
    jsxSelfClosingElement

# JSX Text (simplified)
jsxText ::= [^<>{]+