A CSS selector string. If the command is a response to a request from an #ajax form element then this value can be NULL.
public ChangedCommand::render() Implements
public ChangedCommand::__construct($selector, $asterisk = '')
An optional CSS selector for elements to which asterisks will be appended. Type: string File
An AJAX command for marking HTML elements as changed. This command instructs the client to mark each of the elements matched by the given selector