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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8'> | |
| <style> | |
| * { | |
| box-sizing: border-box; | |
| } | |
| body, | |
| svg, | |
| canvas { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='container'></div> | |
| <!-- <script src='js/vendor/d3.v3.js'></script> --> | |
| <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script> | |
| let w = window.innerWidth, | |
| h = window.innerHeight | |
| let svg = d3.select('#container').append('svg') | |
| .attr({width: w, height: h}) | |
| setInterval(function () { | |
| makeCircle([Math.random()*w, Math.random()*h]) | |
| }, 250) | |
| function makeCircle (coords) { | |
| svg.append('circle') | |
| .attr({cx: coords[0], cy: coords[1], r: 0, fill: 'none', stroke: 'hsl(' + Math.random()*360 + ',100%,70%)', 'stroke-width': 1}) | |
| .style({opacity: 1}) | |
| .transition().duration(1500) | |
| .attr({r: 100}) | |
| .style({opacity: 0}) | |
| .each('end', function () { d3.select(this).remove() }) | |
| } | |
| </script> | |
| </body> | |
| </html> |
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