webgl test

main.go

@@ -95,6 +95,8 @@ func run(ctx context.Context, args []string, errOutput io.Writer, flagSet *flag.
 		)
 	}
 
+	opts = append(opts, chromedp.Flag("single-process", true), chromedp.Flag("use-gl", "swiftshader"))
+
 	// create chrome instance
 	allocCtx, cancelAllocCtx := chromedp.NewExecAllocator(ctx, opts...)
 	defer cancelAllocCtx()

tests/webgl_test.go

@@ -0,0 +1,23 @@
+package test
+
+import (
+	"syscall/js"
+	"testing"
+	"time"
+)
+
+func TestWebGL(t *testing.T) {
+	window := js.Global().Get("window")
+	document := window.Get("document")
+	body := document.Get("body")
+	canvas := document.Call("createElement", "canvas")
+	body.Call("appendChild", canvas)
+	if context := canvas.Call("getContext", "2d"); !context.Truthy() {
+		t.Error("getContext('2d') failed")
+	}
+	if context := canvas.Call("getContext", "webgl"); !context.Truthy() {
+		t.Error("getContext('webgl') failed")
+	}
+
+	time.Sleep(30 * time.Second)
+}