Class ItemList<T>

Add an item to the list.

Get the content of an item.

Get the priority of an item.

Check whether an item is present in the list.

Check whether the list is empty.

Merge another list's items into this one.

The list passed to this function will overwrite items which already exist with the same key.

Remove an item from the list.

If the provided key is not present, nothing will happen.

Replaces an item's content, if the provided item key exists.

If the provided key is not present, an error will be thrown.

Example

Replace item content.

items.setContent('myItem', <p>My new value.</p>);
Copy

Example

Replace item content and priority.

         items
           .setContent('myItem', <p>My new value.</p>)
           .setPriority('myItem', 10);
Copy

Throws

If the provided key is not present in the ItemList.

Replaces an item's priority, if the provided item key exists.

If the provided key is not present, an error will be thrown.

Example

Replace item priority.

items.setPriority('myItem', 10);
Copy

Example

Replace item priority and content.

         items
           .setPriority('myItem', 10)
           .setContent('myItem', <p>My new value.</p>);
Copy

Throws

If the provided key is not present in the ItemList.

Convert the list into an array of item content arranged by priority.

This does not preserve the original types of primitives and proxies all content values to make itemName accessible on them.

NOTE: If your ItemList holds primitive types (such as numbers, booleans or strings), these will be converted to their object counterparts if you do not provide true to this function.

NOTE: Modifying any objects in the final array may also update the content of the original ItemList.

See

https://github.com/flarum/core/issues/3030

Convert the list into an array of item content arranged by priority.

Content values that are already objects will be proxied and have itemName accessible on them. Primitive values will not have the itemName property accessible.

NOTE: Modifying any objects in the final array may also update the content of the original ItemList.

A read-only map of all keys to their respective items in no particular order.

We don't allow adding new items to the ItemList via setting new properties, nor do we allow modifying existing items directly. You should use the add, setContent and setPriority methods instead.

To match the old behaviour of the ItemList.items property, call Object.values(ItemList.toObject()).

Example

const items = new ItemList();
items.add('b', 'My cool value', 20);
items.add('a', 'My value', 10);
items.toObject();
// {
//   a: { content: 'My value', priority: 10, itemName: 'a' },
//   b: { content: 'My cool value', priority: 20, itemName: 'b' },
// }
Copy