// Use IE to see the console log text
var activeSheet = spread.getActiveSheet();

activeSheet.bind(GC.Spread.Sheets.Events.EditStarting, function (sender, args) {
    console.log("Start cell editing.");
});

activeSheet.bind(GC.Spread.Sheets.Events.EditEnded, function (sender, args) {
    console.log("Finish cell editing.");
});