added DataAttr and DataAttrs functions

attrs/utils.go

@@ -0,0 +1,20 @@
+package attrs
+
+import "strings"
+
+// DataAttr returns the name for a data attribute
+func DataAttr(name string) string {
+	var builder strings.Builder
+	builder.WriteString(DataPrefix)
+	builder.WriteString(name)
+	return builder.String()
+}
+
+// DataAttrs returns Props of data attributes build from given name-value pairs
+func DataAttrs(pairs map[string]string) Props {
+	dataProps := Props{}
+	for k, v := range pairs {
+		dataProps[DataAttr(k)] = v
+	}
+	return dataProps
+}

attrs/utils_test.go

@@ -0,0 +1,19 @@
+package attrs
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDataAttr(t *testing.T) {
+	actual := DataAttr("foobar")
+	expected := "data-foobar"
+	assert.Equal(t, expected, actual)
+}
+
+func TestDataAttrs(t *testing.T) {
+	actual := DataAttrs(map[string]string{"theme": "cupcake", "foobar": "baz"})
+	expected := Props{"data-theme": "cupcake", "data-foobar": "baz"}
+	assert.Equal(t, expected, actual)
+}