Generate ASCII Art with 5 FIGlet Fonts Generate ASCII art text with multiple font styles — Standard, Banner, Doom, Big, Slant.

The tool works under the hood by utilizing the figlet library, a JavaScript implementation of the classic FIGlet program, which generates ASCII art text in various fonts. When the user selects a font from the dropdown menu, it updates the state variable font with the chosen font name, triggering a re-rendering of the output using the figlet.textSync function. This synchronous function takes two arguments: the input text and an options object containing the selected font, and returns the generated ASCII art as a string. The tool uses React's useState hook to store the currently selected font and the useCallback hook to memoize the onProcess function, which is called whenever the user inputs new text or changes the font.

The figlet library itself relies on pre-loaded font files, which are imported from the importable-fonts package and registered with figlet.parseFont. The tool registers five fonts: Standard, Banner, Doom, Big, and Slant, each with its unique characteristics, such as different character widths and heights. For example, the Banner font produces the widest output, while the Doom font has tall dramatic characters. When generating ASCII art, the tool uses the figlet.textSync function to render the input text in the selected font, taking into account the font's metrics, such as character width and height.

In terms of data structures, the tool uses a simple array to store the list of available fonts, which is then mapped over to generate the options for the dropdown menu. The tool also uses React's TextToolLayout component to render the input field, output label, and font selection menu. The figlet library itself uses a combination of algorithms and data structures, such as hash tables and arrays, to store and manipulate the font metrics and character data. When generating ASCII art, the tool outputs a string in a plain text format, which can be easily copied and pasted into other applications or used directly in terminal outputs or documentation.