Basic responsive bar chart following pattern described by Russell Goldenberg on The Pudding live coding stream.
Code for bar chart partly based on Hannah Recht's example.
Last active
December 19, 2018 07:53
-
-
Save officeofjane/930211cddd43b980ab981f6777d0c3a2 to your computer and use it in GitHub Desktop.
Basic responsive bar chart
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src='https://d3js.org/d3.v5.min.js'></script> | |
| <style> | |
| body { | |
| font-family: "avenir next", Arial, sans-serif; | |
| font-size: 12px; | |
| margin: 0; | |
| } | |
| .chart { | |
| max-width: 960px; | |
| margin: 0 auto; | |
| background:#ffffe0; | |
| padding:15px; | |
| } | |
| .chart__title{ | |
| background: #ffdc32; | |
| } | |
| .chart__svg { | |
| background:#dcdcdc; | |
| } | |
| rect.bar { | |
| fill:#2e8b57; | |
| } | |
| text { | |
| font-size:12px; | |
| } | |
| text.label { | |
| text-anchor:end; | |
| fill:#fff; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class='chart'> | |
| <div class='chart__inner'> | |
| <h1 class='chart__title'>Chart title</h1> | |
| </div> | |
| </div> | |
| <script> | |
| const margin = { top: 20, right: 30, bottom: 25, left: 65 }; | |
| // $ to indicate a DOM element | |
| const $chart = d3.select('.chart'); | |
| const $chartInner = d3.select('.chart__inner'); | |
| const $svg = $chart.append('svg') | |
| .attr('class', 'chart__svg'); | |
| const $plot = $svg.append('g') | |
| .attr('class', 'plot') | |
| .attr('transform', `translate(${margin.left}, ${margin.top})`) | |
| const x = d3.scaleLinear(); | |
| const y = d3.scaleBand(); | |
| // decouple data joining and data rendering into separate functions | |
| // width and height are dimensions of the plot excluding margins and axes | |
| function resize() { | |
| const w = $chartInner.node().offsetWidth - margin.left - margin.right; | |
| render(w); | |
| } | |
| function render(width) { | |
| const $bars = $plot.selectAll('.bar'); | |
| const $labels = $plot.selectAll('.label'); | |
| const height = width * 0.48 - margin.top - margin.bottom; | |
| x.range([0, width]); | |
| y.range([0, height]).padding(0.15); | |
| const xAxis = d3.axisBottom() | |
| .scale(x) | |
| .ticks(5); | |
| const yAxis = d3.axisLeft() | |
| .scale(y) | |
| .tickSize(0) | |
| .tickPadding(8); | |
| $svg | |
| .attr('width', width + margin.left + margin.right) | |
| .attr('height', height + margin.top + margin.bottom) | |
| // draw bars | |
| $bars | |
| .attr('x', x(0)) | |
| .attr('y', d => y(d.name)) | |
| .attr('width', d => x(d.value) - x(0)) | |
| .attr('height', y.bandwidth()); | |
| // draw axes | |
| $plot.select('.axis.x') | |
| .attr('transform', `translate(0, ${height})`) | |
| .call(xAxis) | |
| .select('.domain').remove(); | |
| $plot.select('.axis.y') | |
| .call(yAxis) | |
| .select('.domain').remove(); | |
| // draw value text labels | |
| $labels | |
| .attr('x', d => x(d.value) - 5) | |
| .attr('y', d => y(d.name) + y.bandwidth() / 2) | |
| .attr('dy', '0.35em') | |
| .text(d => d.value); | |
| } | |
| // init only handles data and binding data to DOM elements | |
| function init() { | |
| const data = [ | |
| { "name": "Apples", "value": 20 }, | |
| { "name": "Bananas", "value": 12 }, | |
| { "name": "Grapes", "value": 19 }, | |
| { "name": "Lemons", "value": 5 }, | |
| { "name": "Limes", "value": 16 }, | |
| { "name": "Oranges", "value": 26 }, | |
| { "name": "Pears", "value": 30 } | |
| ]; | |
| data.sort((a, b) => d3.descending(a.value, b.value)); | |
| x.domain([0, d3.max(data, d => d.value)]); | |
| y.domain(data.map(d => d.name)); | |
| $plot | |
| .append('g') | |
| .attr('class', 'bars') | |
| .selectAll('.bar') | |
| .data(data) | |
| .enter() | |
| .append('rect') | |
| .attr('class', 'bar'); | |
| $plot | |
| .append('g') | |
| .attr('class', 'labels') | |
| .selectAll('.label') | |
| .data(data) | |
| .enter() | |
| .append('text') | |
| .attr('class', 'label'); | |
| $plot | |
| .append('g') | |
| .attr('class', 'axis x') | |
| $plot | |
| .append('g') | |
| .attr('class', 'axis y') | |
| window.addEventListener('resize', debounce(resize, 200)); | |
| resize(); | |
| } | |
| init(); | |
| // https://github.com/component/debounce | |
| function debounce(func, wait, immediate){ | |
| var timeout, args, context, timestamp, result; | |
| if (null == wait) wait = 100; | |
| function later() { | |
| var last = Date.now() - timestamp; | |
| if (last < wait && last >= 0) { | |
| timeout = setTimeout(later, wait - last); | |
| } else { | |
| timeout = null; | |
| if (!immediate) { | |
| result = func.apply(context, args); | |
| context = args = null; | |
| } | |
| } | |
| }; | |
| var debounced = function(){ | |
| context = this; | |
| args = arguments; | |
| timestamp = Date.now(); | |
| var callNow = immediate && !timeout; | |
| if (!timeout) timeout = setTimeout(later, wait); | |
| if (callNow) { | |
| result = func.apply(context, args); | |
| context = args = null; | |
| } | |
| return result; | |
| }; | |
| debounced.clear = function() { | |
| if (timeout) { | |
| clearTimeout(timeout); | |
| timeout = null; | |
| } | |
| }; | |
| debounced.flush = function() { | |
| if (timeout) { | |
| result = func.apply(context, args); | |
| context = args = null; | |
| clearTimeout(timeout); | |
| timeout = null; | |
| } | |
| }; | |
| return debounced; | |
| }; | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment