The size of draggable resizer between panels. The size (width for vertical, height for horizontal) of the draggable resize bar between the panels. If you change spacer during run-time, call .resize() method to apply changes.

Resizer can be set during object creation: let layout = new w2layout({ name : 'layout', resizer : 2, panels : [ { type: 'top', size: 40 }, { type: 'preview', size: 200 } ] }); Or any time after the layout has been created: w2ui.layout.resizer = 2; w2ui.layout.resize();