json-logic-engine/utilities/countArguments.d.ts

Construct complex rules with JSON & process them.

/**
 * Counts the number of arguments a function has; paying attention to the function's signature
 * to avoid edge cases.
 * This is used to allow for compiler optimizations.
 * @param {(...args: any[]) => any} fn
 * @returns {number}
 */
export function countArguments(fn: (...args: any[]) => any): number;