# Event Context Menu (Monthly Event Calendar) | DayPilot Lite for JavaScript Demo

> Note: Right click an event to activate a context menu. Read more about [event context menu](https://doc.daypilot.org/month/event-context-menu/) [doc.daypilot.org].

## Links

- Canonical HTML: /demo/lite/month/eventmenu.html
- Source HTML folder: /demo/lite/month/
- Catalog root: /demo/lite/
- Catalog: /demo/lite/llms.txt

## Source

### Inline demo script 1

```javascript
const dp = new DayPilot.Month("dp", {
            startDate: "2026-03-01",
            contextMenu: new DayPilot.Menu({
                items: [
                    {text: "Edit...", onClick: args => app.editEvent(args.source) },
                    {text: "Delete", onClick: args => app.deleteEvent(args.source) },
                    {text: "-"},
                    {text: "Duplicate", onClick: args => app.duplicateEvent(args.source) },
                    {text: "Postpone", onClick: args => app.postponeEvent(args.source) }
                ]
            }),
            onTimeRangeSelected: async (args) => {
                const modal = await DayPilot.Modal.prompt("New event name:", "Event");
                dp.clearSelection();
                if (modal.canceled) {
                    return;
                }
                dp.events.add({
                    start: args.start,
                    end: args.end,
                    id: DayPilot.guid(),
                    text: modal.result
                });
            }
        });
        dp.init();

        const app = {
            init() {
                app.loadEvents();
            },
            loadEvents() {
                const events = [];

                // generate and load events
                for (var i = 1; i <= 10; i++) {
                    const duration = Math.floor(Math.random() * 1.2);
                    const start = Math.floor(Math.random() * 6) - 3; // -3 to 3

                    events.push({
                        start: new DayPilot.Date("2026-03-04T00:00:00").addDays(start),
                        end: new DayPilot.Date("2026-03-04T12:00:00").addDays(start).addDays(duration),
                        id: DayPilot.guid(),
                        text: "Event " + i
                    });
                }

                dp.update({events});
            },
            async editEvent(e) {
                const modal = await DayPilot.Modal.prompt("Edit event name:", e.text());
                if (modal.canceled) {
                    return;
                }
                e.data.text = modal.result;
                dp.events.update(e);
            },
            deleteEvent(e) {
                dp.events.remove(e);
            },
            duplicateEvent(e) {
                const newEvent = {
                    start: e.start(),
                    end: e.end(),
                    id: DayPilot.guid(),
                    text: e.text() + " (copy)"
                };
                dp.events.add(newEvent);
            },
            postponeEvent(e) {
                const newStart = e.start().addDays(1);
                const newEnd = e.end().addDays(1);
                e.start(newStart);
                e.end(newEnd);
                dp.events.update(e);
            }
        };
        app.init();
```