| license: mit |
This is a multiple line graph demonstrating how to show / hide elements by clicking on other elements. This was written using d3.js v4 and is a follow on to the multiple line graph example here.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 4 of d3.js.
forked from d3noob's block: Toggling element visibility in v4
forked from denisemauldin's block: Toggling element visibility in v4
| [ | |
| { | |
| "date": "1-May-12", | |
| "close": 58.13, | |
| "open": 3.41 | |
| }, | |
| { | |
| "date": "30-Apr-12", | |
| "close": 53.98, | |
| "open": 4.55 | |
| }, | |
| { | |
| "date": "27-Apr-12", | |
| "close": 67, | |
| "open": 6.78 | |
| }, | |
| { | |
| "date": "26-Apr-12", | |
| "close": 89.7, | |
| "open": 7.85 | |
| }, | |
| { | |
| "date": "25-Apr-12", | |
| "close": 99, | |
| "open": 8.92 | |
| }, | |
| { | |
| "date": "24-Apr-12", | |
| "close": 130.28, | |
| "open": 9.92 | |
| }, | |
| { | |
| "date": "23-Apr-12", | |
| "close": 166.7, | |
| "open": 10.13 | |
| }, | |
| { | |
| "date": "20-Apr-12", | |
| "close": 234.98, | |
| "open": 12.23 | |
| }, | |
| { | |
| "date": "19-Apr-12", | |
| "close": 345.44, | |
| "open": 13.45 | |
| }, | |
| { | |
| "date": "18-Apr-12", | |
| "close": 443.34, | |
| "open": 16.04 | |
| }, | |
| { | |
| "date": "17-Apr-12", | |
| "close": 543.7, | |
| "open": 18.03 | |
| }, | |
| { | |
| "date": "16-Apr-12", | |
| "close": 580.13, | |
| "open": 21.02 | |
| }, | |
| { | |
| "date": "13-Apr-12", | |
| "close": 605.23, | |
| "open": 22.34 | |
| }, | |
| { | |
| "date": "12-Apr-12", | |
| "close": 622.77, | |
| "open": 20.15 | |
| }, | |
| { | |
| "date": "11-Apr-12", | |
| "close": 626.2, | |
| "open": 21.26 | |
| }, | |
| { | |
| "date": "10-Apr-12", | |
| "close": 628.44, | |
| "open": 31.04 | |
| }, | |
| { | |
| "date": "9-Apr-12", | |
| "close": 636.23, | |
| "open": 35.04 | |
| }, | |
| { | |
| "date": "5-Apr-12", | |
| "close": 633.68, | |
| "open": 41.02 | |
| }, | |
| { | |
| "date": "4-Apr-12", | |
| "close": 624.31, | |
| "open": 43.05 | |
| }, | |
| { | |
| "date": "3-Apr-12", | |
| "close": 629.32, | |
| "open": 46.03 | |
| }, | |
| { | |
| "date": "2-Apr-12", | |
| "close": 618.63, | |
| "open": 51.03 | |
| }, | |
| { | |
| "date": "30-Mar-12", | |
| "close": 599.55, | |
| "open": 53.42 | |
| }, | |
| { | |
| "date": "29-Mar-12", | |
| "close": 609.86, | |
| "open": 57.82 | |
| }, | |
| { | |
| "date": "28-Mar-12", | |
| "close": 617.62, | |
| "open": 59.01 | |
| }, | |
| { | |
| "date": "27-Mar-12", | |
| "close": 614.48, | |
| "open": 56.03 | |
| }, | |
| { | |
| "date": "26-Mar-12", | |
| "close": 606.98, | |
| "open": 58.01 | |
| } | |
| ] |
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> /* set the CSS */ | |
| .line { | |
| fill: none; | |
| stroke: steelblue; | |
| stroke-width: 2px; | |
| } | |
| .axisSteelBlue text{ | |
| fill: steelblue; | |
| } | |
| .axisRed text{ | |
| fill: red; | |
| } | |
| .legend { | |
| font: 16px sans-serif; | |
| font-weight: bold; | |
| text-anchor: start; | |
| } | |
| </style> | |
| <body> | |
| <!-- load the d3.js library --> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script> | |
| // set the dimensions and margins of the graph | |
| var margin = {top: 20, right: 40, bottom: 60, left: 50}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| // parse the date / time | |
| var parseTime = d3.timeParse("%d-%b-%y"); | |
| // set the ranges | |
| var x = d3.scaleTime().range([0, width]); | |
| var y0 = d3.scaleLinear().range([height, 0]); | |
| var y1 = d3.scaleLinear().range([height, 0]); | |
| // define the 1st line | |
| var valueline = d3.line() | |
| .x(function(d) { return x(d.date); }) | |
| .y(function(d) { return y0(d.close); }); | |
| // define the 2nd line | |
| var valueline2 = d3.line() | |
| .x(function(d) { return x(d.date); }) | |
| .y(function(d) { return y1(d.open); }); | |
| // append the svg obgect to the body of the page | |
| // appends a 'group' element to 'svg' | |
| // moves the 'group' element to the top left margin | |
| var svg = d3.select("body").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 + ")"); | |
| // get the data | |
| const makeRequest = async () => { | |
| try { | |
| // this parse may fail | |
| const data = await d3.json("data.json"); | |
| return data; | |
| } catch (err) { | |
| console.log(err) | |
| throw Error("Failed to load data") | |
| } | |
| } | |
| async function drawGraph(data) { | |
| // format the data | |
| data.forEach(function(d) { | |
| d.date = parseTime(d.date); | |
| d.close = +d.close; | |
| d.open = +d.open; | |
| }); | |
| // scale the range of the data | |
| x.domain(d3.extent(data, function(d) { return d.date; })); | |
| y0.domain([0, d3.max(data, function(d) {return Math.max(d.close);})]); | |
| y1.domain([0, d3.max(data, function(d) {return Math.max(d.open); })]); | |
| // add the valueline path. | |
| svg.append("path") | |
| .data([data]) | |
| .attr("class", "line") | |
| .attr("id", "blueLine") | |
| .attr("d", valueline); | |
| // add the valueline2 path. | |
| svg.append("path") | |
| .data([data]) | |
| .attr("class", "line") | |
| .attr("id", "redLine") | |
| .style("stroke", "red") | |
| .attr("d", valueline2); | |
| // add the X Axis | |
| svg.append("g") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(d3.axisBottom(x)); | |
| // add the Y0 Axis | |
| svg.append("g") | |
| .attr("class", "axisSteelBlue") | |
| .call(d3.axisLeft(y0)); | |
| // add the Y1 Axis | |
| svg.append("g") | |
| .attr("class", "axisRed") | |
| .attr("transform", "translate( " + width + ", 0 )") | |
| .call(d3.axisRight(y1)); | |
| // add the blue line legend | |
| svg.append("text") | |
| .attr("x", 0) | |
| .attr("y", height + margin.top + 15) | |
| .attr("class", "legend") | |
| .style("fill", "steelblue") | |
| .on("click", function(){ | |
| // determine if current line is visible | |
| var active = blueLine.active ? false : true, | |
| newOpacity = active ? 0 : 1; | |
| // hide or show the elements | |
| d3.select("#blueLine").style("opacity", newOpacity); | |
| // update whether or not the elements are active | |
| blueLine.active = active; | |
| }) | |
| .text("Blue Line"); | |
| // add the red line legend | |
| svg.append("text") | |
| .attr("x", 0) | |
| .attr("y", height + margin.top + 35) | |
| .attr("class", "legend") | |
| .style("fill", "red") | |
| .on("click", function(){ | |
| // determine if current line is visible | |
| var active = redLine.active ? false : true, | |
| newOpacity = active ? 0 : 1; | |
| // hide or show the elements | |
| d3.select("#redLine").style("opacity", newOpacity); | |
| // update whether or not the elements are active | |
| redLine.active = active; | |
| }) | |
| .text("Red Line"); | |
| } | |
| makeRequest().then(data => drawGraph(data)); | |
| </script> | |
| </body> |