ComboBox SAP SE The control provides a field that allows end users to either enter some text, or to choose an entry out of a list of pre-defined items. The choosable items can be provided in the form of a complete <code>ListBox</code>, single <code>ListItems</code>. replaced by {@link sap.m.ComboBox} sap.ui.commons/TextField Defines the number of items that shall be displayed at once. If the overall number of items is higher than this setting, a scrollbar is provided. Indicates whether the <code>additionalText</code> property that is available for <code>sap.ui.core.ListItem</code> shall be displayed in the list. Key of the selected item. If the value has no corresponding item the key is empty. If duplicate keys exists the first item matching the key is used. If the key is set to a not existing value it will not be changed. Id of the selected item. If the value has no corresponding item, the <code>selectedItemId</code> is empty. If the <code>selectedItemId</code> is set to a not existing item, it will not be changed. <code>ListItems</code> (see <code>sap.ui.core.ListBox</code>) that shall be displayed in the list. The hidden <code>ListBox</code> which is only used when no shared <code>ListBox</code> is set via association listBox Using this method, you provide a <code>ListBox</code> control. This allows reuse of item lists in different controls. Either a control id can be used as new target, or a control instance. <b>Note:</b> The ListBox must not be rendered somewhere in the UI. But if you want to bind the <code>ListBox</code> items to a model it must be in the control tree. So we suggest to add it as dependent somewhere (e.g. to the view or the first used <code>ComboBox</code>). If it is not set as child or dependant to an other control it will be automatically set as dependent to the first ComboBox where it is assigned.