# Monthly Event Calendar | DayPilot Pro for JavaScript Sandbox

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

## Links

- Canonical HTML: /sandbox/month/index.html
- Source HTML folder: /sandbox/month/
- Catalog root: /sandbox/
- Catalog: /sandbox/llms.txt

## Source

### Inline demo script 1

```javascript
const dp = new DayPilot.Month("dp", {
            cellMarginBottom: 20,
            startDate: DayPilot.Date.today(),
            onEventMoved: (args) => {
                dp.message("Moved: " + args.e.text());
            },
            onEventResized: (args) => {
                dp.message("Resized: " + args.e.text());
            },
            onTimeRangeSelected: async (args) => {
                const modal = await DayPilot.Modal.prompt("New event name:", "Event");
                dp.clearSelection();
                if (!modal.result) return;
                dp.events.add({
                    start: args.start,
                    end: args.end,
                    id: DayPilot.guid(),
                    text: modal.result
                });
                dp.message("Created");
            },
            onEventClicked: (args) => {
                DayPilot.Modal.alert(args.e.text());
            },
            onHeaderClicked: (args) => {
                DayPilot.Modal.alert("day: " + args.header.dayOfWeek);
            },
            contextMenu: new DayPilot.Menu({
                items: [
                    {
                        text: "Edit",
                        onClick: async (args) => {
                            const form = [
                                {id: "text", name: "Event Name", type: "text"}
                            ];
                            const e = args.source;
                            const modal = await DayPilot.Modal.form(form, e.data);
                            if (modal.canceled) {
                                return;
                            }
                            dp.events.update(modal.result);

                        }
                    },
                    {
                        text: "Delete",
                        onClick: (args) => {
                            dp.events.remove(args.source);
                        }
                    },
                    {text: "-"},
                    {
                        text: "Select",
                        onClick: (args) => {
                            dp.multiselect.add(args.source);
                        }
                    },
                ]
            }),
            onBeforeEventRender: args => {
                args.data.areas = [
                    {
                        right: 4,
                        top: "calc(50% - 9px)",
                        width: 18,
                        height: 18,
                        style: "cursor:pointer;",
                        backColor: "#cccccc88",
                        borderRadius: "50%",
                        padding: 2,
                        fontColor: "#333333",
                        symbol: "../icons/daypilot.svg#threedots-h",
                        action: "ContextMenu",
                        toolTip: "Menu"
                    }
                ];
            },
        });
        dp.init();

        const app = {
            loadData() {
                const events = [];
                let start = DayPilot.Date.today().firstDayOfMonth();
                for (let i = 0; i < 15; i++) {
                    const add = Math.floor(Math.random() * 2);
                    // const add = 1;
                    start = start.addDays(add);
                    if (start.getDayOfWeek() === 6) {
                        start = start.addDays(2);
                    }
                    if (start.getDayOfWeek() === 0) {
                        start = start.addDays(1);
                    }

                    events.push({
                        start: start,
                        end: start.addDays(1),
                        id: DayPilot.guid(),
                        barColor: app.barColor(i),
                        text: "Event " + (i + 1)
                    });
                }
                dp.update({events});
            },
            barColor(i) {
                const colors = ["#8FB7E3", "#A9D4A1", "#FFE38F", "#E88B8B"];
                return colors[i % 4];
            },

        };
        app.loadData();
```