@randsum/dice/dist/src/guards/isD.js

A flexible, type-safe dice roller for tabletop RPGs, game development, and probability simulations

export function isD(arg) {
    return (typeof arg === 'object' &&
        arg !== null &&
        'type' in arg &&
        'sides' in arg &&
        'faces' in arg &&
        'isCustom' in arg &&
        'roll' in arg &&
        'rollSpread' in arg &&
        'rollModified' in arg &&
        'toOptions' in arg &&
        (arg.type === 'numeric' || arg.type === 'custom'));
}
export function isNumericDie(die) {
    return die.type === 'numeric';
}
export function isCustomDie(die) {
    return die.type === 'custom';
}