d3-canvas-brush-zoom-04

d3-canvas-brush-zoom-04.js

const brush = d3.brush().extent([[0, 0], [width, height]])
   .on("start", () => { brush_startEvent(); })
   .on("brush", () => { brush_brushEvent(); })
   .on("end", () => { brush_endEvent(); })
   .on("start.nokey", function() {
       d3.select(window).on("keydown.brush keyup.brush", null);
   });

const brushSvg = svgChart
   .append("g")
   .attr("class", "brush")
   .call(brush);