Default settings for the popup. The code below shows the initial object: defaults: { title : '', // html for title - empty by default body : '', // html for body - empty by default buttons : '', // html for buttons - empty by default actions : {}, // object with actions (buttons on the bottom) width : 500, // width of the popup height : 300, // height of the popup style : '', // additional styles color : '#000', // color of the screen lock opacity : 0.4, // opacity of the screen lock speed : 0.3, // speed popup appears modal : false, // if modal, it cannot be closed by clicking on the screen lock maximized : false, // indicates if popup is maximized openMaximized : false, // if true, popup will be opened maximized initially keyboard : true, // will close popup on ESC if not modal showClose : true, // show closed button by default showMax : false, // do not show max button by default transition : null, // no content transition by default multiple : false // if popup already open, opens as a message }, default.actions is an object, here is an example of it actions: { Ok(event) { w2popup.close() }, Cancel(event) { w2popup.close() }, // you can also define a class and style for the button cutom: { class: 'custom-class', style: '<more-css-styles>', click(event) { console.log('button clickced') } } } Each time you open a popup a set of default settings will be used plus whatever properties you provide.