html_tag.go
func newHTMLTag(ln *line, rslt *result, src *source, parent element, opts *Options) (*htmlTag, error) {
	if len(ln.tokens) < 1 {
		return nil, fmt.Errorf("an HTML tag is not specified [file: %s][line: %d]", ln.fileName(), ln.no)
	}

	s := ln.tokens[0]

	tagName := extractTagName(s)

	id, err := extractID(s, ln)
	if err != nil {
		return nil, err
	}

	classes := extractClasses(s)

	e := &htmlTag{
		elementBase:      newElementBase(ln, rslt, src, parent, opts),
		tagName:          tagName,
		id:               id,
		classes:          classes,
		containPlainText: strings.HasSuffix(s, dot),
		insertBr:         strings.HasSuffix(s, doubleDot),
		attributes:       make([]htmlAttribute, 0, 2),
	}

	if err := e.setAttributes(); err != nil {
		return nil, err
	}

	return e, nil
}
func newHTMLTag(ln *line, rslt *result, src *source, parent element, opts *Options) (*htmlTag, error) {
	if len(ln.tokens) < 1 {
		return nil, fmt.Errorf("an HTML tag is not specified [file: %s][line: %d]", ln.fileName(), ln.no)
	}

	s := ln.tokens[0]

	tagName := extractTagName(s)

	id, err := extractID(s, ln)
	if err != nil {
		return nil, err
	}

	classes := extractClasses(s)

	e := &htmlTag{
		elementBase:      newElementBase(ln, rslt, src, parent, opts),
		tagName:          tagName,
		id:               id,
		classes:          classes,
		containPlainText: strings.HasSuffix(s, dot),
		insertBr:         strings.HasSuffix(s, doubleDot),
		attributes:       make([]htmlAttribute, 0, 2),
	}

	if err := e.setAttributes(); err != nil {
		return nil, err
	}

	return e, nil
}
// newHTMLTag creates and returns an HTML tag.