Crate slt 

SLT — Super Light TUI

Immediate-mode terminal UI for Rust. Two dependencies. Zero unsafe.

SLT gives you an egui-style API for terminals: your closure runs each frame, you describe your UI, and SLT handles layout, diffing, and rendering.

Quick Start

fn main() -> std::io::Result<()> {
    slt::run(|ui| {
        ui.text("hello, world");
    })
}

Features

• Flexbox layout — row(), col(), gap(), grow()
• 14 built-in widgets — input, textarea, table, list, tabs, button, checkbox, toggle, spinner, progress, toast, separator, help bar, scrollable
• Styling — bold, italic, dim, underline, 256 colors, RGB
• Mouse — click, hover, drag-to-scroll
• Focus — automatic Tab/Shift+Tab cycling
• Theming — dark/light presets or custom
• Animation — tween and spring primitives with 9 easing functions
• Inline mode — render below your prompt, no alternate screen
• Async — optional tokio integration via async feature
• Layout debugger — F12 to visualize container bounds

Feature Flags

Flag	Description
async	Enable run_async() with tokio channel-based message passing

Re-exports

pub use anim::Spring;

pub use anim::Tween;

pub use context::Context;

pub use context::Response;

pub use event::KeyCode;

pub use event::KeyModifiers;

pub use event::MouseButton;

pub use event::MouseEvent;

pub use event::MouseKind;

pub use style::Align;

pub use style::Border;

pub use style::Color;

pub use style::Constraints;

pub use style::Margin;

pub use style::Modifiers;

pub use style::Padding;

pub use style::Style;

pub use style::Theme;

pub use widgets::ListState;

pub use widgets::ScrollState;

pub use widgets::SpinnerState;

pub use widgets::TableState;

pub use widgets::TabsState;

pub use widgets::TextInputState;

pub use widgets::TextareaState;

pub use widgets::ToastLevel;

pub use widgets::ToastMessage;

pub use widgets::ToastState;

Modules

anim

buffer

cell

context

event

layout

rect

style

widgets

Structs

RunConfig

Configuration for a TUI run loop.

Functions

run

Run the TUI loop with default configuration.

run_inline

Run the TUI in inline mode with default configuration.

run_inline_with

Run the TUI in inline mode with custom configuration.

run_with

Run the TUI loop with custom configuration.