html_tag.go
func extractClasses(s string) []string {
	var classes []string

	for i, token := range strings.Split(s, dot) {
		if i == 0 {
			continue
		}

		class := strings.Split(token, sharp)[0]

		if class == "" {
			continue
		}

		classes = append(classes, class)
	}

	return classes
}
func extractClasses(s string) []string {
	var classes []string

	for i, token := range strings.Split(s, dot) {
		if i == 0 {
			continue
		}

		class := strings.Split(token, sharp)[0]

		if class == "" {
			continue
		}

		classes = append(classes, class)
	}

	return classes
}
// extractClasses extracts and returns classes.