Not affiliated with official shadcn/ui. Visit ui.shadcn.com for official docs.
React Chart - Tooltip - Label Formatter
A React chart tooltip with labelFormatter function to format date labels dynamically using shadcn/ui and Recharts
Looking to implement shadcn/ui patterns?
Join our Discord community for help from other developers.
X-axis shows abbreviated dates, but tooltips need full context. This React bar chart uses labelFormatter prop on ChartTooltipContent to format the tooltip label dynamically—turning 2024-07-15 into July 15, 2024 with JavaScript's toLocaleDateString. Built with shadcn/ui and Recharts, the formatter function receives the raw data value and returns formatted text. Format dates, add prefixes (Week of, Q4), compute contextual labels, or transform any data point identifier into human-readable tooltip headers. Perfect for time-series charts (readable date formats), financial dashboards (fiscal periods), or any chart where axis labels are abbreviated but tooltips need full detail.
Pattern created by @haydenbleasel
Installation
Related patterns you will also like
Default Tooltip
Basic tooltip without formatting
Custom Label Tooltip
Static custom label from config
Tooltip No Label
Tooltip without label header
Value Formatter
Format tooltip values
Line Chart
Line chart with tooltip
Default Bar Chart
Basic bar chart pattern