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https://github.com/semos-labs/glyph

TypeScript TUI framework — React renderer for full-screen, interactive terminal apps with flexbox layout and focus system.
https://github.com/semos-labs/glyph

ansi bun cli flexbox full-screen-app ink-alternative interactive-cli nodejs react react-renderer terminal terminal-ui tui typescript yoga

Last synced: 30 days ago
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TypeScript TUI framework — React renderer for full-screen, interactive terminal apps with flexbox layout and focus system.

Awesome Lists containing this project

README 

          


  Aion




Glyph





  React renderer for terminal UIs


  Flexbox layout. Keyboard-driven. Zero compromises.






  Quick Start •

  Components •

  Hooks •

  Styling •

  Examples






  npm version

  Tests

  React 18+

  Yoga Flexbox

  TypeScript

  MIT License




---



Build real terminal applications with React. Glyph provides a full component model with flexbox layout (powered by Yoga), focus management, keyboard input, and efficient diff-based rendering. Write TUIs the same way you write web apps.



|  | | |

|---|---|---|

| ![Glyph](./screehshots/glyph-main.jpg) | ![Glyph List](./screehshots/glyph-list.jpg) |![Glyph Edit](./screehshots/glyph-edit.jpg) |



### Features



| | |

|---|---|

| **Flexbox Layout** | Full CSS-like flexbox via Yoga — rows, columns, wrapping, alignment, gaps, padding |

| **Rich Components** | Box, Text, Input, Button, Checkbox, Radio, Select, ScrollView, List, Menu, Progress, Spinner, Image, Toasts, Dialogs, Portal, JumpNav |

| **Focus System** | Tab navigation, focus scopes, focus trapping for modals, JumpNav quick-jump hints |

| **Keyboard Input** | `useInput` hook, declarative `` component, vim-style bindings |

| **Smart Rendering** | Double-buffered framebuffer with character-level diffing — only changed cells are written |

| **True Colors** | Named colors, hex, RGB, 256-palette. Auto-contrast text on colored backgrounds |

| **Borders** | Single, double, rounded, and ASCII border styles |

| **TypeScript** | Full type coverage. Every prop, style, and hook is typed |



---



## Quick Start



The fastest way to get started — scaffold a new project:



```bash

# bun

bun create @semos-labs/glyph my-app



# npm

npm create @semos-labs/glyph my-app



# pnpm

pnpm create @semos-labs/glyph my-app



# yarn

yarn create @semos-labs/glyph my-app

```



Then:



```bash

cd my-app

bun install

bun dev

```



### Manual Installation



```bash

# bun

bun add @semos-labs/glyph react



# npm

npm install @semos-labs/glyph react



# pnpm

pnpm add @semos-labs/glyph react

```



---



## Hello World



```tsx

import React from "react";

import { render, Box, Text, Keybind, useApp } from "@semos-labs/glyph";



function App() {

  const { exit } = useApp();



  return (

    

      Hello, Glyph!

       exit()} />

    

  );

}



render();

```



Run it:



```bash

npx tsx app.tsx

```



---



## Components



### ``



Flexbox container. The fundamental building block.



```tsx



  

    Left

  

  

    Right

  



```



### ``



Styled text content. Supports wrapping, alignment, bold, dim, italic, underline.



```tsx



  Warning: something happened



```



**ANSI Escape Codes:** Text automatically parses and renders embedded ANSI escape codes, making it easy to display colorized output from CLI tools, libraries like `chalk`/`picocolors`, or your own styled strings:



```tsx

// Using ANSI codes directly

const coloredText = "\x1b[32mGreen\x1b[0m and \x1b[1;31mBold Red\x1b[0m";

{coloredText}



// Works with chalk, picocolors, etc.

import chalk from "chalk";

{chalk.blue("Blue") + " " + chalk.bold.red("Bold Red")}



// Display CLI output with preserved colors

const gitOutput = execSync("git status --short", { encoding: "utf8" });

{gitOutput}

```



Supports: basic colors (30-37, 40-47), bright colors (90-97, 100-107), 256-color palette (`\x1b[38;5;Nm`), true color RGB (`\x1b[38;2;R;G;Bm`), and attributes (bold, dim, italic, underline).



**Utility functions** for working with ANSI strings:



```tsx

import { parseAnsi, stripAnsi } from "@semos-labs/glyph";



// Parse ANSI into styled segments

const segments = parseAnsi("\x1b[31mRed\x1b[0m Normal");

// [{ text: "Red", style: { fg: "red" } }, { text: " Normal", style: {} }]



// Strip all ANSI codes (useful for width calculations)

stripAnsi("\x1b[32mHello\x1b[0m"); // "Hello"

```



### ``



Text input field with cursor and placeholder support.



```tsx



```



Supports `multiline` for multi-line editing, `autoFocus` for automatic focus on mount. The cursor is always visible when focused.



**Input types** for validation:



```tsx

// Text input (default) - accepts any character



// Number input - only accepts digits, decimal point, minus sign



```



**Input masking** with `onBeforeChange` for validation/formatting:



```tsx

import { createMask, masks } from "@semos-labs/glyph";



// Pre-built masks



// Custom masks: 9=digit, a=letter, *=alphanumeric

const licensePlate = createMask("aaa-9999");



```



Available masks: `usPhone`, `intlPhone`, `creditCard`, `dateUS`, `dateEU`, `dateISO`, `time`, `timeFull`, `ssn`, `zip`, `zipPlus4`, `ipv4`, `mac`.



### ``



Focusable button with press handling and visual feedback.



```tsx

 console.log("clicked")}

  style={{ border: "single", borderColor: "cyan", paddingX: 2 }}

  focusedStyle={{ borderColor: "yellowBright", bold: true }}

>

  Submit



```



Buttons participate in the focus system automatically. Press `Enter` or `Space` to activate.



### ``



Toggle checkbox with label support.



```tsx

const [agreed, setAgreed] = useState(false);



```



Focusable. Press `Enter` or `Space` to toggle. Supports custom `checkedChar` and `uncheckedChar` props.



### ``



Radio button group for single selection from multiple options.



```tsx

const [theme, setTheme] = useState("dark");



```



Focusable. Navigate with `Up`/`Down`/`Left`/`Right`/`Tab`/`Shift+Tab`, select with `Enter`/`Space`. Supports `direction` prop (`"column"` or `"row"`), custom `selectedChar` and `unselectedChar`.



### ``



Scrollable container with keyboard navigation and clipping.



```tsx



  {items.map((item, i) => (

    

      {item}

    

  ))}



```



**Keyboard:** `PageUp`/`PageDown`, `Ctrl+d`/`Ctrl+u` (half-page), `Ctrl+f`/`Ctrl+b` (full page).



Shows a scrollbar when content exceeds viewport (disable with `showScrollbar={false}`). Supports controlled mode with `scrollOffset` and `onScroll` props.



**Focus-aware scrolling:** ScrollView is focusable by default and responds to scroll keys when focused (or when it contains the focused element). This prevents multiple ScrollViews from scrolling simultaneously — only the one with focus responds.



Set `focusable={false}` if you want the ScrollView to only scroll when a child element has focus:



```tsx



    {/* ScrollView scrolls only when Input is focused */}



```



**Virtualization:** For large lists (1000+ items), add the `virtualize` prop to only render visible children. Heights are auto-measured — no configuration needed:



```tsx



  {items.map((item) => (

    {item.name}

  ))}



```



This renders only visible items + a small overscan buffer, making it fast even with 10,000+ items. Use `estimatedItemHeight` prop if your items are taller than 1 line (default).



### ``



Keyboard-navigable selection list with a render callback.



```tsx

 handleSelect(items[index])}

  disabledIndices={new Set([2, 5])}

  renderItem={({ index, selected, focused }) => (

    

      

        {selected ? "> " : "  "}{items[index]}

      

    

  )}

/>

```



Focusable. `Up`/`Down`/`j`/`k` to navigate, `G` to jump to bottom, `gg` to jump to top, `Enter` to select. Disabled indices are skipped.



### ``



Styled menu built on ``. Accepts structured items with labels, values, and disabled state.



```tsx

 handleAction(value)}

  highlightColor="yellow"

/>

```



### ``



Dropdown select with keyboard navigation and type-to-filter search.



```tsx

const [lang, setLang] = useState();



```



Focusable. `Enter`/`Space`/`Down` to open, `Up`/`Down` to navigate, `Enter` to confirm, `Escape` to close. Type characters to filter items when open. Disabled items are skipped.



Props: `items`, `value`, `onChange`, `placeholder`, `maxVisible`, `highlightColor`, `searchable`, `style`, `focusedStyle`, `dropdownStyle`, `disabled`.



### ``



Focus trapping for modals and overlays.



```tsx



  

  

    OK

  



```



### ``



Renders children in a fullscreen absolute overlay. Useful for modals and dialogs.



```tsx



  

    

      Modal content

    

  



```



### ``



Quick keyboard navigation to any focusable element. Press an activation key to show hint labels on all focusable elements, then type the hint to jump directly to that element. Similar to Vim's EasyMotion or browser extensions like Vimium.



```tsx

function App() {

  return (

    

      

        

        

        

        Submit

      

    

  );

}

```



**How it works:**

1. Press `Ctrl+O` (or custom `activationKey`) to activate

2. Hint labels (a, s, d, f...) appear next to each focusable element

3. Type a hint to instantly focus that element

4. Press `Escape` to cancel



**Props:**



| Prop | Type | Default | Description |

|------|------|---------|-------------|

| `activationKey` | `string` | `"ctrl+o"` | Key to activate jump mode |

| `hintChars` | `string` | `"asdfghjkl..."` | Characters used for hints |

| `hintBg` | `Color` | `"yellow"` | Hint label background |

| `hintFg` | `Color` | `"black"` | Hint label text color |

| `hintStyle` | `Style` | `{}` | Additional hint label styling |

| `enabled` | `boolean` | `true` | Enable/disable JumpNav |



**Focus scope aware:** JumpNav automatically respects ``. When a modal with a focus trap is open, only elements inside that trap will show hints.



### ``



Declarative keyboard shortcut. Renders nothing.



```tsx



 exit()} />

```



**Modifiers:** `ctrl`, `alt`, `shift`, `meta` (Cmd/Super). Combine with `+`: `"ctrl+shift+p"`, `"alt+return"`.



**Priority keybinds:** Use `priority` prop to run BEFORE focused input handlers. Useful for keybinds that should work even when an Input is focused:



```tsx



```



**Terminal configuration:** Some keybinds like `ctrl+return` require terminal support:



| Terminal | Configuration |

|----------|---------------|

| **Ghostty** | Add to `~/.config/ghostty/config`: `keybind = ctrl+enter=text:\x1b[13;5~` |

| **iTerm2** | Profiles → Keys → General → Enable "CSI u" mode |

| **Kitty/WezTerm** | Works out of the box |



`alt+return` works universally without configuration.



### ``



Determinate or indeterminate progress bar. Uses `useLayout` to measure actual width and renders block characters.



```tsx



```



Props: `value` (0..1), `indeterminate`, `width`, `label`, `showPercent`, `filled`/`empty` (characters).



### ``



Animated spinner with configurable frames. Cleans up timers on unmount.



```tsx



```



### ``



Display images in the terminal with inline rendering or OS preview. Supports local files and remote URLs.



```tsx



```



**How it works:**

1. By default, shows a placeholder with the image name

2. Focus the component and press `Space` to load

3. Image renders inline (Kitty/iTerm2 protocol) or opens OS preview (Quick Look on macOS)

4. Press `Escape` to return to placeholder, `R` to reload



**Props:**



| Prop | Type | Default | Description |

|------|------|---------|-------------|

| `src` | `string` | required | Local path or remote URL |

| `width` | `number` | auto | Fixed width in cells |

| `height` | `number` | auto | Fixed height in cells |

| `style` | `Style` | `{}` | Container style (flexbox) |

| `focusedStyle` | `Style` | `{}` | Style when focused |

| `inline` | `boolean` | `true` | Allow inline terminal rendering |

| `autoLoad` | `boolean` | `false` | Load automatically on mount |

| `focusable` | `boolean` | `true` | Whether the component is focusable |

| `placeholder` | `string` | filename | Custom placeholder text |

| `onStateChange` | `(state) => void` | - | Called when state changes |

| `onError` | `(error) => void` | - | Called on error |

| `autoSize` | `boolean` | `false` | Auto-size box to fit image dimensions |

| `maxWidth` | `number` | `80` | Max width in cells when autoSize is true |

| `maxHeight` | `number` | `24` | Max height in cells when autoSize is true |



**Terminal support:**

- **Inline rendering:** Kitty, Ghostty, WezTerm, iTerm2 (via Kitty Graphics or iTerm2 protocol)

- **OS preview fallback:** Quick Look (macOS), xdg-open (Linux), start (Windows)



**Remote images** are automatically downloaded and cached. Supported formats: PNG, JPEG, GIF, WebP.



```tsx

// Inline disabled - always use OS preview



// Auto-size: box resizes to fit the image (instead of image fitting in box)



// With state callback

 {

    // "placeholder" | "loading" | "loaded" | "error" | "preview"

    console.log("Image state:", state);

  }}

/>

```



### `` + `useToast()`



Lightweight toast notifications rendered via Portal. Wrap your app in ``, then push toasts from anywhere with `useToast()`.



```tsx

function App() {

  const toast = useToast();

  return 

    toast({ message: "Saved!", variant: "success" })

  } />;

}



render();

```



Variants: `"info"`, `"success"`, `"warning"`, `"error"`. Auto-dismiss after `durationMs` (default 3000).



### `` + `useDialog()`



Imperative `alert()` and `confirm()` dialogs, similar to browser APIs. Wrap your app in ``, then show dialogs from anywhere.



```tsx

function App() {

  const { alert, confirm } = useDialog();



  const handleDelete = async () => {

    const ok = await confirm("Delete this item?", {

      okText: "Delete",

      cancelText: "Keep"

    });

    if (ok) {

      // delete the item

    }

  };



  const handleSave = async () => {

    await saveData();

    await alert("Saved successfully!");

  };



  return Delete;

}



render();

```



**Rich content** — pass React elements instead of strings:



```tsx

await alert(

  

    ✓ Success!

    Your changes have been saved.

  ,

  { okText: "Got it!" }

);

```



**Keyboard:** Tab/Shift+Tab or arrows to switch buttons, Enter/Space to select, Escape to cancel.



**Chained dialogs** work naturally with async/await — each dialog waits for the previous to close.



### ``



Flexible space filler. Pushes siblings apart.



```tsx



  Left

  

  Right



```



---



## Hooks



### `useInput(handler)`



Listen for all keyboard events.



```tsx

useInput((key) => {

  if (key.name === "escape") close();

  if (key.ctrl && key.name === "s") save();

});

```



### `useFocus(nodeRef)`



Get focus state for a node.



```tsx

const ref = useRef(null);

const { focused, focus } = useFocus(ref);



  

    {focused ? "* focused *" : "not focused"}

  



```



### `useFocusable(options)`



Make any element focusable with full keyboard support. Perfect for building custom interactive components.



```tsx

import { useFocusable, Box, Text } from "@semos-labs/glyph";



function CustomPicker({ items, onSelect }) {

  const [selected, setSelected] = useState(0);

  

  const { ref, isFocused } = useFocusable({

    onKeyPress: (key) => {

      if (key.name === "up") {

        setSelected(s => Math.max(0, s - 1));

        return true; // Consume the key

      }

      if (key.name === "down") {

        setSelected(s => Math.min(items.length - 1, s + 1));

        return true;

      }

      if (key.name === "return") {

        onSelect(items[selected]);

        return true;

      }

      return false; // Let other handlers process

    },

    onFocus: () => console.log("Picker focused"),

    onBlur: () => console.log("Picker blurred"),

    disabled: false, // Set to true to skip in tab order

  });



  return (

    

      {items.map((item, i) => (

        

          {i === selected ? "> " : "  "}{item}

        

      ))}

    

  );

}

```



Returns `{ ref, isFocused, focus, focusId }`. The `ref` must be attached to an element with `focusable` prop.



### `useLayout(nodeRef)`



Subscribe to a node's computed layout.



```tsx

const ref = useRef(null);

const layout = useLayout(ref);



// layout: { x, y, width, height, innerX, innerY, innerWidth, innerHeight }

```



### `useApp()`



Access app-level utilities.



```tsx

const { exit, columns, rows } = useApp();

```



---



## Styling



All components accept a `style` prop. Glyph uses Yoga for flexbox layout, so the model is familiar if you've used CSS flexbox or React Native.



### Layout



| Property | Type | Description |

|----------|------|-------------|

| `width`, `height` | `number \| "${n}%"` | Dimensions |

| `minWidth`, `minHeight` | `number` | Minimum dimensions |

| `maxWidth`, `maxHeight` | `number` | Maximum dimensions |

| `padding` | `number` | Padding on all sides |

| `paddingX`, `paddingY` | `number` | Horizontal / vertical padding |

| `paddingTop`, `paddingRight`, `paddingBottom`, `paddingLeft` | `number` | Individual sides |

| `gap` | `number` | Gap between flex children |



### Flexbox



| Property | Type | Default |

|----------|------|---------|

| `flexDirection` | `"row" \| "column"` | `"column"` |

| `flexWrap` | `"nowrap" \| "wrap"` | `"nowrap"` |

| `justifyContent` | `"flex-start" \| "center" \| "flex-end" \| "space-between" \| "space-around"` | `"flex-start"` |

| `alignItems` | `"flex-start" \| "center" \| "flex-end" \| "stretch"` | `"stretch"` |

| `flexGrow` | `number` | `0` |

| `flexShrink` | `number` | `0` |



### Positioning



| Property | Type | Description |

|----------|------|-------------|

| `position` | `"relative" \| "absolute"` | Positioning mode |

| `top`, `right`, `bottom`, `left` | `number \| "${n}%"` | Offsets |

| `inset` | `number \| "${n}%"` | Shorthand for all four edges |

| `zIndex` | `number` | Stacking order |



### Visual



| Property | Type | Description |

|----------|------|-------------|

| `bg` | `Color` | Background color |

| `border` | `"none" \| "single" \| "double" \| "round" \| "ascii"` | Border style |

| `borderColor` | `Color` | Border color |

| `clip` | `boolean` | Clip overflowing children |



### Text



| Property | Type | Description |

|----------|------|-------------|

| `color` | `Color` | Text color |

| `bold` | `boolean` | Bold text |

| `dim` | `boolean` | Dimmed text |

| `italic` | `boolean` | Italic text |

| `underline` | `boolean` | Underlined text |

| `wrap` | `"wrap" \| "truncate" \| "ellipsis" \| "none"` | Text wrapping mode |

| `textAlign` | `"left" \| "center" \| "right"` | Text alignment |



### Colors



Colors can be specified as:



- **Named:** `"red"`, `"green"`, `"blueBright"`, `"whiteBright"`, etc.

- **Hex:** `"#ff0000"`, `"#1a1a2e"`

- **RGB:** `{ r: 255, g: 0, b: 0 }`

- **256-palette:** `0`–`255`



Text on colored backgrounds automatically picks black or white for contrast when no explicit color is set.



---



## `render(element, options?)`



Mount a React element to the terminal.



```tsx

const app = render(, {

  stdout: process.stdout,

  stdin: process.stdin,

  debug: false,

  useNativeCursor: true, // Use terminal's native cursor (default: true)

});



app.unmount(); // Tear down

app.exit();    // Unmount and exit process

```



### Options



| Option | Type | Default | Description |

|--------|------|---------|-------------|

| `stdout` | `NodeJS.WriteStream` | `process.stdout` | Output stream |

| `stdin` | `NodeJS.ReadStream` | `process.stdin` | Input stream |

| `debug` | `boolean` | `false` | Enable debug logging |

| `useNativeCursor` | `boolean` | `true` | Use terminal's native cursor instead of simulated one |



### Native Cursor



By default, Glyph uses the terminal's native cursor, which enables:



- **Cursor shaders** in terminals that support them (e.g., Ghostty)

- **Custom cursor shapes** (block, beam, underline) from terminal settings

- **Cursor animations** and blinking behavior



The native cursor is automatically shown when an input is focused and hidden otherwise.



To use the simulated cursor instead (inverted colors, no shader support):



```tsx

render(, { useNativeCursor: false });

```



---



## Examples



Interactive examples are included in the repo. Each demonstrates different components and patterns:



| Example | Description | Source |

|---------|-------------|--------|

| **basic-layout** | Flexbox layout fundamentals | [View →](https://github.com/semos-labs/glyph/tree/main/examples/basic-layout) |

| **modal-input** | Modal dialogs, input focus trapping | [View →](https://github.com/semos-labs/glyph/tree/main/examples/modal-input) |

| **scrollview-demo** | Scrollable content with keyboard navigation | [View →](https://github.com/semos-labs/glyph/tree/main/examples/scrollview-demo) |

| **list-demo** | Keyboard-navigable lists | [View →](https://github.com/semos-labs/glyph/tree/main/examples/list-demo) |

| **menu-demo** | Styled menus with icons | [View →](https://github.com/semos-labs/glyph/tree/main/examples/menu-demo) |

| **select-demo** | Dropdown select with search | [View →](https://github.com/semos-labs/glyph/tree/main/examples/select-demo) |

| **forms-demo** | Checkbox and Radio inputs | [View →](https://github.com/semos-labs/glyph/tree/main/examples/forms-demo) |

| **masked-input** | Input masks (phone, credit card, SSN) | [View →](https://github.com/semos-labs/glyph/tree/main/examples/masked-input) |

| **dialog-demo** | Alert and Confirm dialogs | [View →](https://github.com/semos-labs/glyph/tree/main/examples/dialog-demo) |

| **jump-nav** | Quick navigation with keyboard hints | [View →](https://github.com/semos-labs/glyph/tree/main/examples/jump-nav) |

| **ansi-text** | ANSI escape codes and colored output | [View →](https://github.com/semos-labs/glyph/tree/main/examples/ansi-text) |

| **image** | Inline images and OS preview | [View →](https://github.com/semos-labs/glyph/tree/main/examples/image) |

| **virtualized-list** | Virtualized ScrollView with 10k+ items | [View →](https://github.com/semos-labs/glyph/tree/main/examples/virtualized-list) |

| **showcase** | Progress bars, Spinners, Toasts | [View →](https://github.com/semos-labs/glyph/tree/main/examples/showcase) |

| **dashboard** | Full task manager (all components) | [View →](https://github.com/semos-labs/glyph/tree/main/examples/dashboard) |



### Running Examples Locally



```bash

# Clone and install

git clone https://github.com/semos-labs/glyph.git && cd glyph

bun install && bun run build



# Run any example

bun run --filter  dev



# e.g.

bun run --filter dashboard dev

bun run --filter jump-nav dev

```



---



## Who Uses Glyph



  

    

      

        Aion

      

      


      Calendar & time management TUI

    

    

      

        Epist

      

      


      Gmail client for your terminal

    

  



Using Glyph in your project? Let us know!



---



## Architecture



```

src/

├── reconciler/    React reconciler (host config + GlyphNode tree)

├── layout/        Yoga-based flexbox + text measurement

├── paint/         Framebuffer, character diffing, borders, colors

├── runtime/       Terminal raw mode, key parsing, OSC handling

├── components/    Box, Text, Input, Button, ScrollView, List, Menu, ...

├── hooks/         useInput, useFocus, useLayout, useApp

└── render.ts      Entry point tying it all together

```



**Render pipeline:** React reconciler builds a GlyphNode tree → Yoga computes flexbox layout → painter rasterizes to a framebuffer → diff engine writes only changed cells to stdout.



---



## License



MIT



---





  Built with React • Yoga • a lot of ANSI escape codes