Merge pull request #1 from AccentDesign/add-if-element-839

add if helper func

examples/conditional/main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/accentdesign/gtml"
+	"os"
+	"time"
+)
+
+func Nav(isLoggedIn bool) *gtml.Element {
+	return gtml.UL(
+		gtml.NA,
+		gtml.LI(gtml.NA, gtml.A(gtml.NA, gtml.Text("Home"))),
+		gtml.If(isLoggedIn, gtml.LI(gtml.NA, gtml.A(gtml.NA, gtml.Text("Profile")))),
+	)
+}
+
+func main() {
+	defer func(start time.Time) {
+		fmt.Println("")
+		fmt.Println(time.Since(start))
+	}(time.Now())
+
+	nav := Nav(true)
+
+	_ = nav.Render(context.Background(), os.Stdout)
+}

helpers.go

@@ -0,0 +1,9 @@
+package gtml
+
+// If returns the element if the condition is true, otherwise returns an empty element.
+func If(condition bool, element *Element) *Element {
+	if condition {
+		return element
+	}
+	return Empty()
+}

helpers_test.go

@@ -0,0 +1,26 @@
+package gtml
+
+import "testing"
+
+// Test the If function with true and false conditions.
+func TestIfFunction(t *testing.T) {
+	tests := []struct {
+		name      string
+		condition bool
+		element   *Element
+		expected  string
+	}{
+		{"IfTrue", true, Div(NA, Text("Visible")), `<div>Visible</div>`},
+		{"IfFalse", false, Div(NA, Text("Visible")), ``},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			node := If(tt.condition, tt.element)
+			output := renderElement(t, node)
+			if output != tt.expected {
+				t.Errorf("Expected %q, got %q", tt.expected, output)
+			}
+		})
+	}
+}