Implementing Blazor Timeline Component

The Syncfusion Blazor Timeline component enables you to display a series of events or milestones in a chronological sequence. It's ideal for visualizing project progress, historical timelines, delivery tracking, or process workflows.

When to Use This Skill

Use the Timeline component when you need to:

• Display events in chronological order (project phases, shipping tracking, workflow steps)
• Show before/after information with opposite content (dates paired with descriptions)
• Create vertical or horizontal timeline layouts
• Customize visual appearance (colors, dots, connectors)
• Render complex content with templates
• Handle component lifecycle events

Component Overview

The Timeline component renders a series of items sequentially, with each item containing:

• Content: Main information or description
• OppositeContent: Secondary information displayed opposite to content
• Dot: Visual indicator (customizable with icons, images, or text)
• Connector: Line connecting items visually

Key capabilities:

• Multiple alignment modes (Before, After, Alternate, AlternateReverse)
• Horizontal and vertical orientations
• Custom item styling and disabled states
• Event callbacks for component lifecycle
• Template-based rendering for advanced layouts
• Reverse order rendering

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

• Install Syncfusion.Blazor.Layouts and Themes NuGet packages
• Configure imports and register Blazor service
• Add stylesheet and script resources
• Create your first basic timeline
• Run and test the application

Timeline Alignment

📄 Read: references/timeline-alignment.md

• Control content display with Alignment property
• Before: Content placed before/left, OppositeContent after/right
• After: Content placed after/right, OppositeContent before/left
• Alternate: Items arranged alternately regardless of orientation
• AlternateReverse: Reverse alternate arrangement
• Using OppositeContent with alignments

Timeline Items

📄 Read: references/timeline-items.md

• Add TimelineItem components with Content directive
• String content vs template content approaches
• OppositeContent for dual information display
• Customize dots with DotCss (icons, images, text)
• Disable items with Disabled property
• Apply custom CSS classes with CssClass

Timeline Orientation

📄 Read: references/timeline-orientation.md

• Vertical orientation: Display items sequentially top-to-bottom (default)
• Horizontal orientation: Display items side-by-side
• Combine orientation with alignment for different layouts
• Responsive considerations

Timeline Events

📄 Read: references/timeline-events.md

• Created: Fires when component rendering is completed
• ItemRendered: Fires after each item is rendered
• Access event arguments and item information
• Common event handling patterns

Styling & Customization

📄 Read: references/timeline-styling-customization.md

• Connector styling (common and individual)
• Dot color, size, shadow, and variant customization
• CSS variables for dot appearance (--dot-size, --dot-outer-space, --dot-border)
• Dot outline mode (e-outline class)
• Component-level CSS classes

Template & Advanced Patterns

📄 Read: references/timeline-templates.md

• Template directive for complete item customization
• Access Item and ItemIndex from template context
• Create progress bars, custom connectors, and indicators
• Advanced layout patterns

API Reference

📄 Read: references/api-reference.md

• Complete SfTimeline component properties
• TimelineItem properties and configuration
• TimelineAlignment enumeration values
• TimelineOrientation enumeration values
• TimelineRenderedEventArgs event arguments
• CSS classes and CSS variables
• Code examples for all APIs
• Common implementation patterns

Quick Start Example

@using Syncfusion.Blazor.Layouts

<div style="height: 350px;">
    <SfTimeline>
        <TimelineItems>
            <TimelineItem>
                <Content>Event 1</Content>
                <OppositeContent>2024-01-01</OppositeContent>
            </TimelineItem>
            <TimelineItem>
                <Content>Event 2</Content>
                <OppositeContent>2024-01-15</OppositeContent>
            </TimelineItem>
            <TimelineItem>
                <Content>Event 3</Content>
                <OppositeContent>2024-02-01</OppositeContent>
            </TimelineItem>
        </TimelineItems>
    </SfTimeline>
</div>

Common Use Cases

1. Order/Shipping Timeline

Display order status with timestamps and locations using alignment with opposite content.

2. Project Milestone Timeline

Show project phases with start/end dates and descriptions using horizontal orientation.

3. Historical Timeline

Present historical events vertically with dates on one side and descriptions on the other using Alternate alignment.

4. Progress Tracking

Visualize workflow steps with custom dot colors and disabled states for completed vs. pending items.

Key Properties

Item Properties:

Key Setup Steps

1. Install NuGet packages: Syncfusion.Blazor.Layouts, Syncfusion.Blazor.Themes
2. Add imports: @using Syncfusion.Blazor.Layouts in _Imports.razor
3. Register service: builder.Services.AddSyncfusionBlazor() in Program.cs
4. Include stylesheet: Add material3.css to index.html
5. Create timeline: Use <SfTimeline> with <TimelineItems> collection