Intro
Here is a scaffold for a responsive D3 chart inside a React functional component. Includes scaffold for Redux. This structure should be chart agnostic, but detects and saves container dimensions in state and reloads chart when dimensions change.
Based on knowledge we put together in these posts:
Ncoughlin: D3 React Responsive Chart
CSS
Vital classes to fill available space and also make tooltips work if you are implementing them.
.chart-container {
width: 100%;
}
.chart-svg-container {
width: 100%;
height: 800px;
/* required for tooltip positioning */
position: relative;
}Component
This component detects the size of the container and feeds that into the chart dynamically as width and height. It automatically re-renders the chart if the dimensions change (window is resized) and clears all previous elements before re-drawing. See post above for more details on this method.
import React, { useRef, useEffect, useState } from "react";
// libraries
import * as d3 from "d3";
// redux
import { connect } from "react-redux";
const SomeChart = (props) => {
// Element References
const svgRef = useRef(null);
const svgContainer = useRef(null); // The PARENT of the SVG
// State to track width and height of SVG Container
const [width, setWidth] = useState();
const [height, setHeight] = useState();
// calculate width and height of container
const getSvgContainerSize = () => {
const newWidth = svgContainer.current.clientWidth;
setWidth(newWidth);
const newHeight = svgContainer.current.clientHeight;
setHeight(newHeight);
};
// resizer
useEffect(() => {
// get 'width' and 'height' on render
getSvgContainerSize();
// listen for resize changes
window.addEventListener("resize", getSvgContainerSize);
// cleanup event listener
return () => window.removeEventListener("resize", getSvgContainerSize);
}, []);
// draw chart
useEffect(() => {
// D3 Code
// Dimensions
let dimensions = {
width: width,
height: height,
margins: 50,
};
dimensions.containerWidth = dimensions.width - dimensions.margins * 2;
dimensions.containerHeight = dimensions.height - dimensions.margins * 2;
// selections
const svg = d3
.select(svgRef.current)
.attr("width", dimensions.width)
.attr("height", dimensions.height);
// clear all previous content on refresh
const everything = svg.selectAll("*");
everything.remove();
const container = svg
.append("g")
.attr(
"transform",
`translate(${dimensions.margins}, ${dimensions.margins})`
);
// rest of d3 code ...
// const someElement = container.append('g')
// ...
}, [width, height]); // redraw chart if data or dimensions change
const renderContent = () => {
return (
<div className="chart-container">
<div ref={svgContainer} className="chart-svg-container">
<svg ref={svgRef} />
</div>
</div>
);
};
return <>{renderContent()}</>;
};
// map state to props
function mapState(state) {
return {};
}
// map actions to props
const mapDispatch = {};
// connect store
export default connect(mapState, mapDispatch)(SomeChart);
