Agent-readable demo data

Title

Resource Tree Animation (JavaScript Scheduler) | DayPilot Pro for JavaScript Demo

Tree

DayPilot JavaScript Demo

Catalog root

Default

Description

Expand or collapse a team using the arrow next to its name. Teams contain 1, 3, 10, 30 and 100 resources. Auto duration adjusts the animation duration to the height of the content, between 240 and 550 ms. Settings apply automatically when changed.

• Canonical HTML: /demo/scheduler/treeanimation.html
• Markdown companion: /demo/scheduler/treeanimation.md
• Folder: /demo/scheduler/
• Root: /demo/
• Catalog: /demo/llms.txt

Inline demo script 1

const dp = new DayPilot.Scheduler("dp", {
            startDate: "2026-09-01",
            days: 21,
            scale: "Day",
            cellWidthSpec: "Auto",
            cellWidthMin: 30,
            floatingTimeHeaders: false,
            timeHeaders: [{groupBy: "Month"}, {groupBy: "Day", format: "d"}],
            heightSpec: "Max",
            height: 450,
            rowMarginTop: 2,
            rowMarginBottom: 2,
            rowHeaderWidth: 230,
            treeEnabled: true,
            treeAnimation: true,
            treeAnimationDuration: "Auto",
            treeAnimationEasing: "standard",
            eventMoveHandling: "Disabled",
            eventResizeHandling: "Disabled",
            timeRangeSelectedHandling: "Disabled"
        });
        dp.init();

        const app = {
            init() {
                this.loadData();
                document.getElementById("animation-settings").addEventListener("change", () => {
                    this.apply();
                });
                this.preference = window.matchMedia("(prefers-reduced-motion: reduce)");
                this.preference.addEventListener("change", () => this.showPreference());
                this.showPreference();
                this.showConfiguration();
            },
            loadData() {
                const teams = [
                    {id: "planning", name: "Planning", count: 1},
                    {id: "design", name: "Design", count: 3},
                    {id: "development", name: "Development", count: 10},
                    {id: "operations", name: "Operations", count: 30},
                    {id: "production", name: "Production", count: 100}
                ];
                const start = new DayPilot.Date(dp.startDate);
                const resources = [];
                const events = [];
                const links = [];
                for (const [index, team] of teams.entries()) {
                    const children = [];
                    for (let row = 0; row < team.count; row++) {
                        const id = team.id + "-" + row;
                        const offset = (row % 4) * 2;
                        children.push({id, name: team.name + " " + (row + 1)});
                        events.push(
                            {
                                id: id + "-plan",
                                resource: id,
                                text: "Preparation",
                                start: start.addDays(offset + 1),
                                end: start.addDays(offset + 3)
                            },
                            {
                                id: id + "-work",
                                resource: id,
                                text: "Delivery",
                                start: start.addDays(offset + 4),
                                end: start.addDays(offset + 7)
                            }
                        );
                        links.push({id: id + "-link", from: id + "-plan", to: id + "-work"});
                        if (row > 0 && row % 3 === 0) {
                            links.push({id: id + "-handoff", from: team.id + "-" + (row - 1) + "-work", to: id + "-work"});
                        }
                    }
                    resources.push({
                        id: team.id,
                        name: team.name + " (" + team.count + (team.count === 1 ? " resource)" : " resources)"),
                        expanded: index < 2,
                        children
                    });
                }
                dp.update({resources, events, links});
            },
            showPreference() {
                document.getElementById("motion-preference").hidden = !(
                    dp.treeAnimation === "Auto" &&
                    dp.treeAnimationDuration !== 0 &&
                    this.preference.matches
                );
            },
            apply() {
                if (!document.getElementById("animation-settings").reportValidity()) {
                    this.message("Enter valid settings. The previous configuration remains active.", true);
                    return;
                }
                const animation = document.getElementById("animation").value;
                const duration =
                    document.getElementById("duration").value === "Auto"
                        ? "Auto"
                        : Number(document.getElementById("duration").value);
                const easing = document.getElementById("easing").value;
                try {
                    // Animation settings are read at the next tree toggle; no redraw is needed.
                    dp.treeAnimation = animation === "Auto" ? "Auto" : animation === "true";
                    dp.treeAnimationDuration = duration;
                    dp.treeAnimationEasing = easing;
                    this.showPreference();
                    this.showConfiguration();
                    this.message("");
                } catch (error) {
                    this.message(error.message, true);
                }
            },
            message(text, error = false) {
                const message = document.getElementById("animation-message");
                message.textContent = text;
                message.hidden = !text;
                message.classList.toggle("error", error);
            },
            showConfiguration() {
                document.getElementById("configuration").textContent =
                    'heightSpec: "Max",\n' +
                    "treeEnabled: true,\n" +
                    "treeAnimation: " +
                    JSON.stringify(dp.treeAnimation) +
                    ",\n" +
                    "treeAnimationDuration: " +
                    JSON.stringify(dp.treeAnimationDuration) +
                    ",\n" +
                    "treeAnimationEasing: " +
                    JSON.stringify(dp.treeAnimationEasing);
            }
        };

        app.init();