Add viewport dimensions and dark mode support

This commit introduces optional viewport dimensions and dark mode support to the PlayWrightBrowserOptions struct and its usage. It ensures more control over browser display settings and improves flexibility when configuring browser contexts. Additionally, visibility checking logic in SetHidden was refined to avoid redundant operations.

node.go

@@ -87,8 +87,21 @@ func (n node) ForEach(selector string, fn func(Node) error) error {
 }
 
 func (n node) SetHidden(val bool) error {
-	_, err := n.locator.Evaluate(fmt.Sprintf(`(element) => element.hidden = %t;`, val), nil)
-	return err
+	visible, err := n.locator.IsVisible()
+	if err != nil {
+		return fmt.Errorf("error checking visibility: %w", err)
+	}
+	if visible == !val {
+		return nil
+	}
+
+	// Set the hidden property
+	_, err = n.locator.Evaluate(fmt.Sprintf(`(element) => element.hidden = %t;`, val), nil)
+	if err != nil {
+		return fmt.Errorf("error setting hidden property: %w", err)
+	}
+
+	return nil
 }
 
 func escapeJavaScript(s string) string {

playwright.go

@@ -36,6 +36,10 @@ const (
 	PlayWrightBrowserSelectionWebKit   PlayWrightBrowserSelection = "webkit"
 )
 
+type Size struct {
+	Width  int
+	Height int
+}
 type PlayWrightBrowserOptions struct {
 	UserAgent string                     // If empty, defaults to "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0"
 	Browser   PlayWrightBrowserSelection // If unset defaults to Firefox.
@@ -46,6 +50,9 @@ type PlayWrightBrowserOptions struct {
 	CookieJar
 
 	ShowBrowser bool // If false, browser will be headless
+
+	Dimensions Size
+	DarkMode   bool
 }
 
 func cookieToPlaywrightOptionalCookie(cookie Cookie) playwright.OptionalCookie {
@@ -76,6 +83,7 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 		UserAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0",
 		Browser:   PlayWrightBrowserSelectionFirefox,
 		Timeout:   &thirtySeconds,
+		DarkMode:  false,
 	}
 
 	for _, o := range opts {
@@ -91,6 +99,13 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 		if o.CookieJar != nil {
 			opt.CookieJar = o.CookieJar
 		}
+		if o.Dimensions.Width > 0 && o.Dimensions.Height > 0 {
+			opt.Dimensions = o.Dimensions
+		}
+		if o.DarkMode {
+			opt.DarkMode = true
+		}
+
 		opt.ShowBrowser = o.ShowBrowser
 	}
 
@@ -133,8 +148,26 @@ func NewPlayWrightBrowser(opts ...PlayWrightBrowserOptions) (Browser, error) {
 		return nil, err
 	}
 
+	var viewport *playwright.Size
+	if opt.Dimensions.Width > 0 && opt.Dimensions.Height > 0 {
+		viewport = &playwright.Size{
+			Width:  opt.Dimensions.Width,
+			Height: opt.Dimensions.Height,
+		}
+	}
+
+	var scheme *playwright.ColorScheme
+
+	if opt.DarkMode {
+		scheme = playwright.ColorSchemeDark
+	} else {
+		scheme = playwright.ColorSchemeNoPreference
+	}
+
 	c, err := browser.NewContext(playwright.BrowserNewContextOptions{
 		UserAgent:   playwright.String(opt.UserAgent),
+		Viewport:    viewport,
+		ColorScheme: scheme,
 	})
 	if err != nil {
 		return nil, err