Like |:echomsg| but when the messages popup window is available the message is displayed there. This means it will show for three seconds and avoid a |hit-enter| prompt. If you want to hide it before that, press Esc in Normal mode (when it would otherwise beep). If it disappears too soon you can use :messages to see the text. When [N] is given then the window will show up for this number of seconds. The last :echowindow with a count matters, it is used once only. The message window is available when Vim was compiled with the +timer and the +popupwin features.

denops_backport

Only one string can be specified. If :echowindow not available, :echomsg is used. If opt.highlight is specified, the highlight gourp is changed with :echohl and restored to None after execution.