How can I create a bar chart using D3.js?

How can I create a bar chart using D3.js?

To create a bar chart with D3.js, you'll need to set up your SVG canvas, define your data, and use the D3 functions to bind the data to the SVG elements.

What data format do I need for D3.js?

D3.js works well with JSON or CSV formats. You can load your data using D3's built-in functions like d3.json() or d3.csv().

Can you show me a simple code example?

Sure! Here's a basic example:

const data = [4, 8, 15, 16, 23, 42];
const svg = d3.select('svg');
const barHeight = 20;

svg.selectAll('rect')
   .data(data)
   .enter()
   .append('rect')
   .attr('width', d => d * 10)
   .attr('height', barHeight - 1)
   .attr('y', (d, i) => i * barHeight);

What are some common mistakes to avoid?

Common mistakes include not properly binding data, forgetting to set the SVG dimensions, and not handling scales correctly.