ComboBox SAP SE A drop-down list for selecting and filtering values. <h3>Overview</h3> The control represents a drop-down menu with a list of the available options and a text input field to narrow down the options. <h3>Structure</h3> The combo-box consists of the following elements: <ul> <li> Input field - displays the selected option or a custom user entry. Users can type to narrow down the list or enter their own value.</li> <li> Drop-down arrow - expands\collapses the option list.</li> <li> Option list - the list of available options.</li> </ul> By setting the <code>showSecondaryValues</code> property, the combo box can display an additional value for each option (if there is one). <h3>Usage</h3> <h4>When to use:</h4> <ul> <li>You need to select only one item in a long list of options (between 13 and 200) or your custom user input.</li> </ul> <h4>When not to use:</h4> <ul> <li>You need to select between only two options. Use a {@link sap.m.Switch switch} control instead.</li> <li>You need to select between up to 12 options. Use a {@link sap.m.Select select} control instead.</li> <li>You need to select between more than 200 options. Use a {@link sap.m.Input input} control with value help instead.</li> </ul> <h3>Responsive Behavior</h3> <ul> <li>The width of the option list adapts to its content. The minimum width is the input field plus the drop-down arrow.</li> <li>There is no horizontal scrolling in the option list. Entries in the list that are too long will be truncated.</li> <li>On phone devices the combo box option list opens a dialog.</li> </ul> 1.22 sap.m/ComboBoxBase Key of the selected item. <b>Note:</b> If duplicate keys exist, the first item matching the key is used. ID of the selected item. Indicates whether the filter should check in both the <code>text</code> and the <code>additionalText</code> property of the {@link sap.ui.core.ListItem} for the suggestion. This event is fired when the value in the text input field is changed in combination with one of the following actions: <ul> <li>The focus leaves the text input field</li> <li>The <i>Enter</i> key is pressed</li> <li>An item in the list is selected</li> </ul> The new <code>value</code> of the <code>control</code> Indicates whether the change event was caused by selecting an item in the list This event is fired when the user types something that matches with an item in the list; it is also fired when the user presses on a list item, or when navigating via keyboard. The selected item. Sets or retrieves the selected item from the aggregation named items.