@instructure/quiz-interactions/lib/util/focusHelpers.js

A React UI component Library for quiz interaction types.

import findIndex from 'lodash/findIndex';
import isString from 'lodash/isString';
export function getNextItemIdFromArray(itemId, items) {
    if (items.length > 1) {
        // the array can have objects or strings
        var indexCurrentItem = findIndex(items, function(item) {
            return item.id === itemId || item === itemId;
        });
        // get previous item if exists, else the next item
        var nextItem = items[indexCurrentItem - 1] || items[indexCurrentItem + 1];
        if (nextItem.id) {
            // if nextItem is an object with an id
            return nextItem.id;
        }
        if (isString(nextItem)) {
            // if nextItem a sting
            return nextItem;
        }
    }
}