For declarative support, define the controls in your HTML document as HTML tags.
For this, use the following data attribute that defines the OpenUI5 control that should be rendered in the HTML tag by using the HTML tag as its UI area:
data-sap-ui-type="sap.ui.commons.Button"
Rendering a button in the body of an HTML document without setting any property, association, event, or aggregation looks as follows:
#!html <body> <div data-sap-ui-type="sap.ui.commons.Button"></div> </body>