这个旧的缩放和平移 d3js 代码如何转换为 d3js.v7？

Question

// set the dimensions and margins of the graph
var margin = {top: 10, right: 30, bottom: 30, left: 60},
    width = 460 - margin.left - margin.right,
    height = 400 - margin.top - margin.bottom;

// append the SVG object to the body of the page
var SVG = d3.select("#dataviz_axisZoom")
  .append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform",
          "translate(" + margin.left + "," + margin.top + ")");

//Read the data
d3.csv("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/iris.csv", function(data) {

  // Add X axis
  var x = d3.scaleLinear()
    .domain([4, 8])
    .range([ 0, width ]);
  var xAxis = SVG.append("g")
    .attr("transform", "translate(0," + height + ")")
    .call(d3.axisBottom(x));

  // Add Y axis
  var y = d3.scaleLinear()
    .domain([0, 9])
    .range([ height, 0]);
  var yAxis = SVG.append("g")
    .call(d3.axisLeft(y));

  // Add a clipPath: everything out of this area won't be drawn.
  var clip = SVG.append("defs").append("SVG:clipPath")
      .attr("id", "clip")
      .append("SVG:rect")
      .attr("width", width )
      .attr("height", height )
      .attr("x", 0)
      .attr("y", 0);

  // Create the scatter variable: where both the circles and the brush take place
  var scatter = SVG.append('g')
    .attr("clip-path", "url(#clip)")

  // Add circles
  scatter
    .selectAll("circle")
    .data(data)
    .enter()
    .append("circle")
      .attr("cx", function (d) { return x(d.Sepal_Length); } )
      .attr("cy", function (d) { return y(d.Petal_Length); } )
      .attr("r", 8)
      .style("fill", "#61a3a9")
      .style("opacity", 0.5)

  // Set the zoom and Pan features: how much you can zoom, on which part, and what to do when there is a zoom
  var zoom = d3.zoom()
      .scaleExtent([.5, 20])  // This control how much you can unzoom (x0.5) and zoom (x20)
      .extent([[0, 0], [width, height]])
      .on("zoom", updateChart);

  // This add an invisible rect on top of the chart area. This rect can recover pointer events: necessary to understand when the user zoom
  SVG.append("rect")
      .attr("width", width)
      .attr("height", height)
      .style("fill", "none")
      .style("pointer-events", "all")
      .attr('transform', 'translate(' + margin.left + ',' + margin.top + ')')
      .call(zoom);
  // now the user can zoom and it will trigger the function called updateChart

  // A function that updates the chart when the user zoom and thus new boundaries are available
  function updateChart() {

    // recover the new scale
    var newX = d3.event.transform.rescaleX(x);
    var newY = d3.event.transform.rescaleY(y);

    // update axes with these new boundaries
    xAxis.call(d3.axisBottom(newX))
    yAxis.call(d3.axisLeft(newY))

    // update circle position
    scatter
      .selectAll("circle")
      .attr('cx', function(d) {return newX(d.Sepal_Length)})
      .attr('cy', function(d) {return newY(d.Petal_Length)});
  }

})

我尝试使用此代码，但我不断收到错误消息，指出 d3.event.transform 函数（在 updateChat() 函数中）不再起作用，并且在新版本的 d3js 中已被弃用。如何在最新版本的 d3.js 中编写此代码。我正在尝试弄清楚如何使用 d3js 中的缩放功能来更改轴的比例以及内容，而不仅仅是像 d3js 缩放功能封面上的大多数在线指南那样的内容。