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+# HTML [![GoDoc](http://godoc.org/github.com/tdewolff/parse/html?status.svg)](http://godoc.org/github.com/tdewolff/parse/html) [![GoCover](http://gocover.io/_badge/github.com/tdewolff/parse/html)](http://gocover.io/github.com/tdewolff/parse/html)
+
+This package is an HTML5 lexer written in [Go][1]. It follows the specification at [The HTML syntax](http://www.w3.org/TR/html5/syntax.html). The lexer takes an io.Reader and converts it into tokens until the EOF.
+
+## Installation
+Run the following command
+
+	go get github.com/tdewolff/parse/html
+
+or add the following import and run project with `go get`
+
+	import "github.com/tdewolff/parse/html"
+
+## Lexer
+### Usage
+The following initializes a new Lexer with io.Reader `r`:
+``` go
+l := html.NewLexer(r)
+```
+
+To tokenize until EOF an error, use:
+``` go
+for {
+	tt, data := l.Next()
+	switch tt {
+	case html.ErrorToken:
+		// error or EOF set in l.Err()
+		return
+	case html.StartTagToken:
+		// ...
+		for {
+			ttAttr, dataAttr := l.Next()
+			if ttAttr != html.AttributeToken {
+				break
+			}
+			// ...
+		}
+	// ...
+	}
+}
+```
+
+All tokens:
+``` go
+ErrorToken TokenType = iota // extra token when errors occur
+CommentToken
+DoctypeToken
+StartTagToken
+StartTagCloseToken
+StartTagVoidToken
+EndTagToken
+AttributeToken
+TextToken
+```
+
+### Examples
+``` go
+package main
+
+import (
+	"os"
+
+	"github.com/tdewolff/parse/html"
+)
+
+// Tokenize HTML from stdin.
+func main() {
+	l := html.NewLexer(os.Stdin)
+	for {
+		tt, data := l.Next()
+		switch tt {
+		case html.ErrorToken:
+			if l.Err() != io.EOF {
+				fmt.Println("Error on line", l.Line(), ":", l.Err())
+			}
+			return
+		case html.StartTagToken:
+			fmt.Println("Tag", string(data))
+			for {
+				ttAttr, dataAttr := l.Next()
+				if ttAttr != html.AttributeToken {
+					break
+				}
+
+				key := dataAttr
+				val := l.AttrVal()
+				fmt.Println("Attribute", string(key), "=", string(val))
+			}
+		// ...
+		}
+	}
+}
+```
+
+## License
+Released under the [MIT license](https://github.com/tdewolff/parse/blob/master/LICENSE.md).
+
+[1]: http://golang.org/ "Go Language"