Definitions

The definitions below are an essential part of the parser.

Node Types

The type of a node is determined during parsing and represented by one of the elements in the list below.

Type	Description
`HDOM_TYPE_ELEMENT`	Start tag (i.e. `<html>`)
`HDOM_TYPE_COMMENT`	HTML comment (i.e. `<!-- Hello, World! -->`)
`HDOM_TYPE_TEXT`	Plain text (i.e. `Hello, World!`)
`HDOM_TYPE_ENDTAG`	End tag (i.e. `</html>`)
`HDOM_TYPE_ROOT`	Root element. There can always only be one root element in the DOM.
`HDOM_TYPE_UNKNOWN`	Unknown type (i.e. CDATA, DOCTYPE, etc...)

<!DOCTYPE html><html><!-- Hello, World! --></html>Hello, World!

Note: HDOM_TYPE_ROOT always exists regardless of the actual document structure.

Identifies the quoting type on attribute values.

Note: Attributes with no values (flags) are stored as HDOM_QUOTE_NO.

<p class="paragraph" id='info1' hidden>Hello, World!</p>

Each node stores additional information (metadata) that is identified by the elements below.

Type	Description
`HDOM_INFO_BEGIN`	Cursor position for the start tag of a node.
`HDOM_INFO_END`	Cursor position for the end tag of a node. A value of zero indicates a node with no end tag (missing closing tag).
`HDOM_INFO_QUOTE`	Quote type for attribute values. The value must be an element of Quote Type.
`HDOM_INFO_SPACE`	Array of whitespace around attributes (see Attribute Whitespace).
`HDOM_INFO_TEXT`	Non-HTML text in tags (i.e. comments, doctype, etc...).
`HDOM_INFO_INNER`	Inner text of a node.
`HDOM_INFO_OUTER`	Outer text of a node.
`HDOM_INFO_ENDSPACE`	Whitespace at the end of a tag before the closing bracket.

Whitespace around attributes is stored in the form of an array with three elements:

Element	Description
`0`	Whitespace before the attribute name.
`1`	Whitespace between attribute name and the equal sign.
`2`	Whitespace between the equal sign and the attribute value

<p class="paragraph" id = 'info1'hidden>Hello, World!</p>

Note: Whitespace before attribute names is not displayed in the browser. It is, however, part of the attributes.