Control Terminal

• Control terminal cursor
• Terminal string styling

Installation

Install using pnpm:

pnpm add control-terminal

Or yarn:

yarn add control-terminal

Or npm:

npm i control-terminal

Usage

import * as terminal from 'control-terminal';
console.log(terminal.style.bold.blue('Hello world!'));
console.log(terminal.style.bgBlue.hex('#ff7b72')('Blue backgroud'));
terminal.cursor.erasePreviousLine();
console.log(terminal.style.bgRgb(255, 123, 114).underline('Underline'));

Output:

Cursor

The methods in terminal.cursor namespace will help you control cursor and terminal.

Moving cursor methods:

• goTo(line: number, column: number): Move the cursor to a specific position (line >= 1, column >= 1)
• gotoStart(): Move the cursor to line 1, column 1
• carriageReturn(): Move the cursor to start of line
• up(line: number = 1): Move the cursor up line lines
• down(line: number = 1): Move the cursor down line lines
• forward(column: number = 1): Move the cursor forward column columns
• backward(column: number = 1): Move the cursor backward column columns
• previousLine(): Move the cursor up 1 line, column 1

Clear screen methods:

• clearScreen(): Clear the screen
• reset(): Reset device
• eraseToEndLine(): Erase to the end of line that begins the cursor’s current position
• eraseToEndScreen(): Erase to the end of screen that begins the cursor’s current position
• eraseCurrentLine(): Erase the current line of the cursor

  // Two these are equivalent.
  terminal.cursor.eraseCurrentLine();
  terminal.cursor.carriageReturn().eraseToEndLine();

• erasePreviousLine(line: number = 1): Erase the previous line from the cursor

  // Two these are equivalent.
  terminal.cursor.erasePreviousLine(line);
  terminal.cursor.up(line).eraseCurrentLine();

Other methods:

• hide(): Hide cursor
• save(): Save cursor position
• restore(): Restore cursor position

Styles

The terminal.style namespace will help you string styling.

Modifiers:

• reset: Resets the current color chain.
• bold: Make text bold.
• dim: Emitting only a small amount of light.
• italic: Make text italic. (Not widely supported)
• underline: Make text underline. (Not widely supported)
• slowBlink: Make text slow blink. (Not widely supported)
• rapidBlink: Make text rapid blink. (Not widely supported)
• inverse: Inverse background and foreground colors.
• hidden: Prints the text, but makes it invisible.
• strikethrough: Puts a horizontal line through the center of the text. (Not widely supported)
• fraktur: Make text fraktur. (Not widely supported)
• framed: Make text framed. (Not widely supported)
• encircled: Make text encircled. (Not widely supported)
• overline: Make text overline. (Not widely supported)

Colors:

• black
• red
• green
• yellow
• blue
• magenta
• cyan
• white
• blackBright
• redBright
• greenBright
• yellowBright
• blueBright
• magentaBright
• cyanBright
• whiteBright

Background colors:

• bgBlack
• bgRed
• bgGreen
• bgYellow
• bgBlue
• bgMagenta
• bgCyan
• bgWhite
• bgBlackBright
• bgRedBright
• bgGreenBright
• bgYellowBright
• bgBlueBright
• bgMagentaBright
• bgCyanBright
• bgWhiteBright

Example:

console.log(terminal.style.bold.bgCyan.green('Hello'));
console.log(terminal.style.italic.bgBlack.white.underline('Hello'));
console.log(terminal.style.white.inverse.bgMagentaBright('Hello'));

Support 256 color and True color

Control Terminal support 256 colors and True color (16 million colors) on terminal applications.

The following color models can be used:

256 colors:

• ansi256(code: number)

terminal.style.ansi256(12)('Blue text');

• bgAnsi256(code: number)

terminal.style.bgAnsi256(12)('Blue background');

RGB:

• rgb(red: number, green: number, blue: number)

terminal.style.rgb(88, 166, 255)('Blue text');

• bgRgb(red: number, green: number, blue: number)

terminal.style.bgRgb(88, 166, 255)('Blue background');

Hex:

• hex(hex: string)

terminal.style.hex('#58a6ff')('Blue text');

• bgHex(hex: string)

terminal.style.bgHex('#58a6ff')('Blue background');