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react-grid-heatmap
Advanced tools
Weekly downloads
Readme
A React component to visualize heatmap in a grid layout without using any 3rd party libraries.
npm install --save react-grid-heatmap
Mandatory fields
Name | Type | Sample |
---|---|---|
data | number[][] | [[1,2,3], [4,5,6], [7,8,9]] |
import React from 'react'
import { HeatMapGrid } from 'react-grid-heatmap'
const xLabels = new Array(24).fill(0).map((_, i) => `${i}`)
const yLabels = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri']
const data = new Array(yLabels.length)
.fill(0)
.map(() =>
new Array(xLabels.length).fill(0).map(() => Math.floor(Math.random() * 50 + 50))
)
const App = () => {
return (
<HeatMapGrid
data={data}
xLabels={xLabels}
yLabels={yLabels}
/>
)
}
export default App
Optional Parameters
Name | Type | Description/Example | Default Value |
---|---|---|---|
xLabels | string[] | ['1am', '2am', '3am'] | null |
yLabels | string[] | ['Sun', 'Mon'] | null |
cellHeight | string | Height of each cell of the heatmap | "2rem" |
onClick | function | Adds an handler to cell click(x, y) => void | null |
square | boolean | If set to true will render cells as square | false |
xLabelsPos | string | Location of y labels. It can be top or bottom | "top" |
yLabelsPos | string | Location of y labels. It can be left or right | "left" |
cellRender | function | Render custom content in cell.(x, y, value) => () | null |
cellStyle | function | To set custom cell style(x, y, ratio) => {} | null |
xLabelsStyle | function | To set custom cell style(index) => {} | null |
yLabelsStyle | function | To set custom cell style(index) => {} | null |
A sample code with all parameters
import React from 'react'
import { HeatMapGrid } from 'react-grid-heatmap'
const xLabels = new Array(24).fill(0).map((_, i) => `${i}`)
const yLabels = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri']
const data = new Array(yLabels.length)
.fill(0)
.map(() =>
new Array(xLabels.length)
.fill(0)
.map(() => Math.floor(Math.random() * 50 + 50))
)
const App = () => {
return (
<div
style={{
width: '100%'
}}
>
<HeatMapGrid
data={data}
xLabels={xLabels}
yLabels={yLabels}
// Render cell with tooltip
cellRender={(x, y, value) => (
<div title={`Pos(${x}, ${y}) = ${value}`}>{value}</div>
)}
xLabelsStyle={(index) => ({
color: index % 2 ? 'transparent' : '#777',
fontSize: '.8rem'
})}
yLabelsStyle={() => ({
fontSize: '.7rem',
textTransform: 'uppercase',
color: '#777'
})}
cellStyle={(_x, _y, ratio) => ({
background: `rgb(12, 160, 44, ${ratio})`,
fontSize: '.8rem',
color: `rgb(0, 0, 0, ${ratio / 2 + 0.4})`
})}
cellHeight='2rem'
xLabelsPos='bottom'
onClick={(x, y) => alert(`Clicked (${x}, ${y})`)}
yLabelsPos='right'
square
/>
</div>
)
}
export default App
Local development is broken into two parts (ideally using two tabs).
First, run rollup to watch your src/
module and automatically recompile it into dist/
whenever you make changes.
npm start # runs rollup with watch flag
The second part will be running the example/
create-react-app that's linked to the local version of your module.
# (in another tab)
cd example
npm start # runs create-react-app dev server
Now, anytime you make a change to your library in src/
or to the example app's example/src
, create-react-app
will live-reload your local dev server so you can iterate on your component in real-time.
MIT © arunghosh
FAQs
A react component for heatmap visualisation in grid layout
The npm package react-grid-heatmap receives a total of 3,869 weekly downloads. As such, react-grid-heatmap popularity was classified as popular.
We found that react-grid-heatmap demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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