mapbox - Leaflet: Keep PopUp Open -

i'm trying create popup stays open until click x in top right corner close down. best way this? code below, thanks!

      //pop code      //create custom icon       var newicon = l.icon({         iconurl: 'logo.png',       })        // creating marker       var marker = l.marker(new l.latlng(41.77, -87.6), {       icon: l.mapbox.marker.icon({           'marker-color': 'ff8888'       }),       icon: newicon,       draggable: true,   }).addto(map);        // bind popup marker       marker.bindpopup("i text stay open until closed").openpopup(); 

use:

var newpopup = l.popup({ closeonclick: false }).setcontent("i text stay open until closed");  marker.bindpopup(newpopup);