# JavaScript Event Calendar | DayPilot Pro for JavaScript Demo

> Customize the component using [Calendar UI Builder](https://builder.daypilot.org/calendar) and download a ready-to-run project. Read more about the [JavaScript event calendar](https://javascript.daypilot.org/calendar/).

## Links

- Canonical HTML: /demo/calendar/queue.html
- Source HTML folder: /demo/calendar/
- Catalog root: /demo/
- Catalog: /demo/llms.txt

## Source

### Inline demo script 1

```javascript
const dp = new DayPilot.Calendar("dp", {
            startDate: DayPilot.Date.today(),
            viewType: "Week",
            onEventMove: args => {
                console.log("onEventMove", args);
                if (args.external) {
                    console.log("removing");
                    queue.events.remove(args.e.data.id);
                }
            },
            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(),
                    resource: args.resource,
                    text: modal.result
                });
                dp.message("Created");
            },
            dragOutAllowed: true,
        });

        dp.init();

        const queue = new DayPilot.Queue("queue", {
            onEventMove: args => {
                if (args.external) {
                    console.log("removing", args);
                    dp.events.remove(args.e.data.id);
                }
            },
            contextMenu: new DayPilot.Menu({
                items: [
                    {text: "Open", onClick: args => DayPilot.Modal.alert(args.source.text())}
                ]
            }),
            onEventClick: args => {
                DayPilot.Modal.alert(args.e.text());
            }
        });
        queue.init();


        const app = {
            loadData() {
                const first = DayPilot.Date.today().firstDayOfWeek("en-us").addDays(1);
                const calendarEvents = [
                    {
                        start: first.addHours(12).addMinutes(15),
                        end: first.addHours(15),
                        id: 1,
                        text: "Event 1",
                        barColor: "#3c78d8",
                        barBackColor: "#a4c2f4"
                    },
                    {
                        start: first.addDays(1).addHours(10),
                        end: first.addDays(1).addHours(12),
                        id: 2,
                        text: "Event 2",
                        barColor: "#6aa84f",
                        barBackColor: "#b6d7a8"
                    },
                    {
                        start: first.addDays(1).addHours(13),
                        end: first.addDays(1).addHours(15),
                        id: 3,
                        text: "Event 3",
                        barColor: "#f1c232",
                        barBackColor: "#ffe599"
                    },
                    {
                        start: first.addDays(2).addHours(11).addMinutes(15),
                        end: first.addDays(2).addHours(16).addMinutes(15),
                        id: 4,
                        text: "Event 4",
                        barColor: "#cc0000",
                        barBackColor: "#ea9999"
                    },
                ];
                dp.update({events: calendarEvents});

                const queueEvents =  [
                    { id: 5, start: "2026-01-01T00:00:00", end: "2026-01-01T04:00:00", text: "Event A", tags: {myfield: "value"}, bubbleHtml: "Event details"},
                    { id: 6, duration: DayPilot.Duration.ofHours(3), text: "Event B"},
                    { id: 7, duration: DayPilot.Duration.ofHours(3), text: "Event C"},
                    { id: 8, duration: DayPilot.Duration.ofHours(3), text: "Event D"},
                ];
                queue.update({events: queueEvents});

            },
            init() {
                this.loadData();
            }
        };
        app.init();
```