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practice-1
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<!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; } </style> </head> <body> <svg> </svg> <script> var rectWidth = 100; var height = 500; var data = [55, 275, 190, 29, 364, 500]; var svg = d3.select('svg') .attr('width', 600) .attr('height', 600); var rects = svg.selectAll('rect') .data(data) .enter() .append('rect') .attr('x', function(d, i) { return i * rectWidth}) .attr('y', function(d) { return height - d}) .attr('width', rectWidth) .attr('height', function(d) { return d}) .attr('fill', function(d) { return d > 250 ? 'green' : 'red'}) .attr('stroke', 'white') .attr('stroke-width', 5) console.log(rects.nodes()); console.log(rects.data()); </script> </body>
https://d3js.org/d3.v4.min.js