Function validLifecycleFn

src/lifecycles/lifecycle.helpers.js:5–13

(fn)

import { formatErrorMessage } from "../applications/app-errors.js";

export function validLifecycleFn(fn) {
  return fn && (typeof fn === "function" || isArrayOfFns(fn));

  function isArrayOfFns(arr) {
    return (
      Array.isArray(arr) && !find(arr, (item) => typeof item !== "function")
    );
  }
}

export function flattenFnArray(appOrParcel, lifecycle) {
  let fns = appOrParcel[lifecycle] || [];