Placeholders, JavaScript Programming Example of Placeholders in SpreadSheet

webix.ready(function(){

  function lock(){
    var ids = $$("ssheet").getSelectedId(true);
    if(!ids.length)
      $$("ssheet").alert({text: "A cell is not selected"});
    else{
      var state = $$("ssheet").isCellLocked(ids[0].row, ids[0].column);
      if(ids.length == 1) //lock a single cell
        $$("ssheet").lockCell(ids[0].row, ids[0].column, !state);
      else  //lock cell range
        $$("ssheet").lockCell(ids[0], ids[ids.length-1], !state);
    }
  }

  webix.ui({
    cols:[
      {
        width:200, padding:5, 
        rows:[
          { view:"button", label: "Lock / unlock cell",  click: lock},
          {}
        ]
      },
      {
        view:"spreadsheet",
        id:"ssheet",
        toolbar: "full",
        data:{
          data:[
            [3,2,"Webix"],
            [3,3,"SpreadSheet"]
          ]
        }
      }
    ]

  });
});