The HTML Details Element (<details>) is used as a disclosure widget from which the user can retrieve additional information.

Element HTML HTML interactive elements Reference Web

The HTML summary element (<summary>) is used as a summary, caption, or legend for the content of a <details> element.

Element HTML HTML interactive elements Reference Web

Returns a reference to the element by its ID; the ID is a string which can be used to identify the element; it can be established using the id attribute in HTML, or from script.

API Document DOM Elements id Method Reference Web

Returns the first element that is a descendant of the element on which it is invoked that matches the specified group of selectors.

API CSS DOM Element Elements Method Reference Selectors

The HTML <dialog> element represents a dialog box or other interactive component, such as an inspector or window. <form> elements can be integrated within a dialog by specifying them with the attribute method="dialog". When such a form is submitted, the dialog is closed with a returnValue attribute set to the value of the submit button used.

Dialog Element Experimental HTML HTML interactive elements Reference Web

The HTML <menu> element represents a group of commands that a user can perform or activate. This includes both list menus, which might appear across the top of a screen, as well as context menus, such as those that might appear underneath a button after it has been clicked.

Element Experimental HTML HTML interactive elements Reference Web

The HTML <menuitem> element represents a command that a user is able to invoke through a popup menu. This includes context menus, as well as menus that might be attached to a menu button.

Element Experimental HTML HTML interactive elements HTML5 Reference Web