Now when we zoom, the points move in/out. When we pan, they move vertically/horizontally. Unfortunately, the axes don't update accordingly. Let's first add IDs to the <g> elements that contain them. Find the following code:
var bottomAxis = d3.axisBottom(xScale);d3.select('svg') .append('g') .call(bottomAxis) .attr('transform', 'translate(0,'+HEIGHT+')');var leftAxis = d3.axisLeft(yScale);d3.select('svg') .append('g') .call(leftAxis);
Add .attr('id', 'x-axis') after the first .append('g'), and .attr('id', 'y-axis') after the second .append('g'):
d3.select('svg') .append('g') .attr('id', 'x-axis') //add an id .call(bottomAxis) .attr('transform', 'translate(0,'+HEIGHT+')');var leftAxis = d3.axisLeft(yScale); ...