NgNotification — Notification · Software Next Generation

Manual · Getting started · Code examples · Models

When to use it

Show an inline application status message.

Appearance and live example

Try the Blazor example · Flutter example code

The live Blazor preview is embedded above. Use Reset to restore its initial state. Flutter implementation code is provided below; run the Flutter gallery from the installed developer workspace. Dialogs and drawers start closed; use their Open button. Tooltips appear on hover or keyboard focus.

Behavior and practical rules

Message is plain text. Tone controls semantic color; do not communicate meaning through color alone. Dismissal invokes the supplied callback; update Visible/visible in the parent. This is not a timed global toast queue. Keep critical validation errors next to their fields and avoid placing confidential exception details in user-facing text.

Blazor example

Razor / Blazor

<NgNotification @bind-Visible="visible" Tone="success">Saved</NgNotification>
@code { private bool visible=true; }

Flutter example

Dart / Flutter

bool visible = true;
Widget build(BuildContext context) => visible ? NgNotification(message: 'Saved',
  onDismiss: () => setState(() => visible = false)) : const SizedBox.shrink();

Blazor parameters and events

Names are case-sensitive. ? permits null. EditorRequired parameters are marked required; other values use the initializer or CLR default.

Parameter	Type	Default / requirement	Purpose
`Visible`	`bool`	true	See the behavior rules and model contract above.
`VisibleChanged`	`EventCallback<bool>`	not set	See the behavior rules and model contract above.
`Tone`	`string`	"success"	See the behavior rules and model contract above.
`ChildContent`	`RenderFragment?`	not set	Razor content; for a wizard, a RenderFragment<int> receiving the active index.

Flutter parameters and events

required marks a mandatory argument even if its type is nullable. key is the standard Flutter Key. The exact constructor below specifies defaults.

Argument	Type	Purpose
`message`	`String`	See the behavior rules and model contract above.
`onDismiss`	`VoidCallback?`	See the behavior rules and model contract above.
`error`	`bool`	See the behavior rules and model contract above.

Dart / Flutter

const NgNotification({
    super.key,
    required this.message,
    this.onDismiss,
    this.error = false,
  });

Integration and troubleshooting

If the UI does not update, confirm that the parent stores callback values and passes them back. Blazor event handlers need interactive rendering; Flutter requires setState or a state manager. Submit form data only after successful validation.

Check accessible labels, empty/invalid states, disabled actions and narrow layouts. Keyboard support is not full screen-reader certification. Current visual verification targets Web in visible Chrome on Linux/iMac; native mobile platforms are a separate phase.

Source and complete examples

Blazor source
Flutter source
Galleries and launch commands
Capability matrix

API declarations are generated from current source. Curated examples and behavior live in scripts/manual_content.py; regenerate with python3 scripts/generate_manual.py.