Created
June 4, 2018 20:09
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d3 class
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="x-ua-compatible" content="ie=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> | |
| <style> | |
| .line { | |
| fill: none; | |
| stroke: steelblue; | |
| stroke-width: 1; | |
| } | |
| .dot { | |
| fill: steelblue; | |
| stroke: #fff; | |
| stroke-width: 3; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <svg></svg> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script> | |
| const defaults = { | |
| target: '#chart', | |
| width: 640, | |
| height: 480, | |
| margin: { | |
| top: 20, | |
| right: 20, | |
| bottom: 30, | |
| left: 40 | |
| } | |
| } | |
| class LineChart { | |
| constructor(config) { | |
| Object.assign(this, defaults, config) | |
| this.init() | |
| } | |
| init() { | |
| const {target, width, height, margin} = this | |
| const w = width - margin.left - margin.right | |
| const h = height - margin.top - margin.bottom | |
| this.svg = d3.select(target) | |
| .attr('width', width) | |
| .attr('height', height) | |
| .append('g') | |
| .attr('transform', `translate(${margin.left}, ${margin.top})`) | |
| this.xScale = d3.scaleLinear() | |
| .range([0, w]) | |
| this.yScale = d3.scaleLinear() | |
| .range([h, 0]) | |
| this.line = d3.line() | |
| .x((d, i) => this.xScale(i)) | |
| .y(d => this.yScale(d)) | |
| this.xAxis = d3.axisBottom(this.xScale) | |
| this.svg | |
| .append('g') | |
| .attr('class', 'x axis') | |
| .attr('transform', `translate(0, ${h})`) | |
| .call(this.xAxis) | |
| this.yAxis = d3.axisLeft(this.yScale) | |
| this.svg | |
| .append('g') | |
| .attr('class', 'y axis') | |
| .call(this.yAxis) | |
| this.svg | |
| .append('path') | |
| .attr('class', 'line') | |
| } | |
| render(data) { | |
| const {xScale, yScale, xAxis, yAxis, svg} = this | |
| xScale.domain([0, data.length - 1]) | |
| svg.select('.x.axis') | |
| .call(xAxis) | |
| yScale.domain([0, 10]) | |
| svg.select('.y.axis') | |
| .call(yAxis) | |
| svg | |
| .select('.line') | |
| .datum(data) | |
| .attr('d', this.line) | |
| svg | |
| .selectAll('.dot') | |
| .data(data) | |
| .enter() | |
| .append('circle') | |
| .attr('class', 'dot') | |
| .attr('cx', (d, i) => xScale(i)) | |
| .attr('cy', d => yScale(d)) | |
| .attr('r', 5) | |
| } | |
| resize(width) { | |
| const {svg, target, margin, xScale, xAxis, line} = this | |
| d3.select(target) | |
| .attr('width', width) | |
| const w = width - margin.left - margin.right | |
| xScale.range([0, w]) | |
| svg.select('.x.axis') | |
| .call(xAxis) | |
| svg.selectAll('.dot') | |
| .attr('cx', (d, i) => xScale(i)) | |
| svg.select('.line') | |
| .attr('d', line) | |
| } | |
| } | |
| const config = { | |
| target: 'svg', | |
| width: document.body.clientWidth | |
| } | |
| const chart = new LineChart(config) | |
| const data = [1, 0, 3, 2, 5, 4, 7, 6, 9, 8] | |
| chart.render(data) | |
| window.onresize = () => { | |
| const width = document.body.clientWidth | |
| chart.resize(width) | |
| } | |
| </script> | |
| </body> | |
| </html> |
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