Line Chart
Responsive single-series line chart with smooth monotone interpolation, custom data points, and animated reveal.
◆Curve Interpolation: Monotone vs Linear vs Step
Configure type='monotone' for smooth natural fluid trajectories (ideal for ARR and active users). Use type='linear' when direct point-to-point precision is required (e.g. scientific or financial tickers), or type='stepAfter' for discreet state transitions.
<Line type="monotone" dataKey="arr" stroke="#00e5a0" strokeWidth={3} dot={{ r: 4, fill: '#0b0d0f', stroke: '#00e5a0', strokeWidth: 2 }} />◆Interactive Glowing Dots & Active Hover Ring
Pass custom SVG circle elements or configure activeDot={{ r: 7, fill: '#00e5a0', stroke: '#0b0d0f', strokeWidth: 3 }} to create high-visibility focal points when hovering over data milestones.
activeDot={{ r: 7, fill: '#00e5a0', stroke: '#0b0d0f', strokeWidth: 3 }}◆Reference Lines for Goals & Targets
Overlay target thresholds or break-even milestones with ReferenceLine using dashed strokes and branded label positioning.
<ReferenceLine y={250000} stroke="#f59e0b" strokeDasharray="4 4" label={{ value: "Target: $250k", fill: "#f59e0b", fontSize: 11, position: "right" }} />A Line Chart is ideal for developers and designers who need to display data clearly and effectively. Use this chart type when:
- ✓Showing trends over time (e.g. daily active users over 30 days)
- ✓Comparing multiple metrics on the same timeline
- ✓Displaying continuous data like temperature, stock prices, or heart rate
- ✓Highlighting growth rates and momentum
What is a line chart and when should you use it?
A line chart connects individual data points with continuous straight or curved line segments over an ordered sequence (most commonly time). It is the premier visualization for revealing trends, velocity, acceleration, and cyclical seasonality in continuous metrics like ARR, website visitors, server latency, or stock valuation.
Line chart vs. bar chart: what is the difference and which is better?
Use a line chart when data is continuous along an ordered timeline (days, weeks, months) to emphasize trajectory, rate of change, and future projections. Use a bar chart when comparing discrete, unordered categories (e.g. sales by country or department) where each bar represents an independent group.
How do you make a line chart in React with Recharts vs Excel / Google Sheets?
In Excel or Google Sheets, creating a line chart involves static cell ranges, manual ribbon menus, and rigid styling wizards. In React with Recharts, you pass standard JSON arrays to <LineChart><XAxis dataKey='date'/><YAxis/><Tooltip/><Line type='monotone' dataKey='value' stroke='#00e5a0'/></LineChart>, unlocking dynamic real-time data feeds, responsive SVG scaling, custom glowing markers, and seamless dark mode toggles.
Can I generate a line chart with Mermaid.js syntax?
Yes, Mermaid.js supports line charts via its experimental xychart syntax (e.g. 'xychart-beta line [10, 20, 35, 50]'). However, for production web dashboards and SaaS applications, React Recharts is significantly more powerful, offering interactive SVG tooltips, custom dot markers, animations, and zero build hurdles.
How do you format axes for currency or percentages in Recharts?
Pass a custom function to the tickFormatter prop of <YAxis tickFormatter={(val) => `$${(val / 1000).toFixed(0)}k`} /> to cleanly abbreviate large numbers without cluttering the chart canvas.