Yevhen-Kryvdiuk/js_todo

TODO

Create the Todo class with the following methods:

• constructor(): initialization with the empty list of TODO items;
• addItem(title, priority): adds an item with the given title and priority to the list; the method returns the unique id assigned to the item (positive integer);
• removeItem(id): removes the item with the given id from the list of items: it should return true if the item with the given id was successfully removed or false if there was no such item;
• getItem(id): returns an object that contains the id, title, and priority fields for the item with the provided id (if there is no such item, it should return null);
• next(): returns the highest priority item from the list in the same format as getItem (if there are several items of the same priority, return the one that was added before others; if there are no items in the list, throw an error).