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Enter and Update
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| 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.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| svg { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <svg></svg> | |
| <script> | |
| var rectWidth = 100; | |
| var height = 300; | |
| var data = [ | |
| 100, 250, 175, 200, 120 | |
| ]; | |
| var colors = d3.scaleOrdinal(d3.schemeCategory10); | |
| var svg = d3.select('svg'); | |
| // Update | |
| var bars = svg.selectAll('rect') | |
| .data(data, d => d); | |
| // exit | |
| bars.exit().remove(); | |
| // enter | |
| var enter = bars.enter().append('rect') | |
| .attr('width', rectWidth) | |
| .attr('stroke', '#fff'); | |
| // enter + update | |
| bars = enter.merge(bars) | |
| .attr('x', (d, i) => i * rectWidth) | |
| .attr('y', d => height - d) | |
| .attr('height', d => d) | |
| .attr('fill', d => colors(d)); | |
| </script> | |
| </body> |
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