void-tags.go

package GoHtml

/*
A void element is an element in HTML that cannot have any child nodes (i.e., nested elements or text nodes). Void elements only have a start tag; end tags must not be specified for void elements.
*/

import (
	"strings"
)

//Void tags
const (
	Area   string = "area"
	Base   string = "base"
	Br     string = "br"
	Col    string = "col"
	Embed  string = "embed"
	Hr     string = "hr"
	Img    string = "img"
	Input  string = "input"
	Link   string = "link"
	Meta   string = "meta"
	Param  string = "param"
	Source string = "source"
	Track  string = "track"
	Wbr    string = "wbr"
)

var (
	voidTags = map[string]bool{
		"area":     true,
		"base":     true,
		"br":       true,
		"col":      true,
		"embed":    true,
		"hr":       true,
		"img":      true,
		"input":    true,
		"link":     true,
		"meta":     true,
		"param":    true,
		"source":   true,
		"track":    true,
		"wbr":      true,
		"!doctype": true,
	}
)

// IsVoidTag returns whether the tagName is a void tag or DTD
func IsVoidTag(tagName string) bool {
	tagName = strings.TrimSpace(strings.ToLower(tagName))
	return voidTags[tagName]
}

/*
A DTD defines the structure and the legal elements and attributes of an XML document.
*/
const (
	//This is not a void el. but added it anyway.
	DOCTYPEDTD string = "!DOCTYPE"
)