javascript-d3How can I use D3.js Observable to create interactive data visualizations?

Creating interactive data visualizations with D3.js Observable is easy and straightforward.

Here is an example of how to create a basic scatter plot with a tooltip using D3.js Observable:

import {scatter, select} from "@d3/mitch-dataviz";

const data = [
  {x: 10, y: 20},
  {x: 15, y: 25},
  {x: 20, y: 30}
];

const width = 500;
const height = 500;

scatter()
  .width(width)
  .height(height)
  .data(data)
  .render();

select("circle")
  .on("mouseover", d => console.log(d))
  .on("mouseout", () => console.log("mouseout"));

When a user hovers over a circle, the data object associated with the circle will be logged to the console.

The code above consists of the following parts:

1. Importing the scatter and select functions from the @d3/mitch-dataviz library
2. Defining the data to be used for the visualization
3. Setting the width and height of the visualization
4. Calling the scatter function to render the visualization
5. Using the select function to select the circles in the visualization and attaching mouseover and mouseout event handlers that log data to the console

For more information, see the D3.js Observable documentation.

Edit this code on GitHub