objectUpdateNested.js

// @ts-check

/**
 * @export
 * @param {object} targetObj
 * @param {array} arPathAndValue
 * 
 * @example objectUpdateNested(menuChoicesLS, [ this.groupId, this.programId, weekday, type, String(alt) ])
 */
export function objectUpdateNested(targetObj, arPathAndValue) {
  let current = targetObj;

  const value = arPathAndValue.pop();

  for (let i = 0; i < arPathAndValue.length - 1; i++) {
    if (typeof current[arPathAndValue[i]] !== 'object' || current[arPathAndValue[i]] === null) {
      current[arPathAndValue[i]] = {};
    }
    current = current[arPathAndValue[i]];
  }
  current[arPathAndValue[arPathAndValue.length - 1]] = value;
}