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October 29, 2015 13:20
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D3js Enter, Update and Exit demo
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js" charset="utf-8"></script> | |
| </head> | |
| <body> | |
| <script language="javascript"> | |
| var scale = d3.scale.linear() | |
| .domain([1, 5]) // Data space | |
| .range([0, 200]); // Pixel space | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", 250) | |
| .attr("height", 250); | |
| function render(data, color) { | |
| var rects = svg.selectAll("rect").data(data); | |
| // Enter | |
| rects.enter().append("rect") | |
| .attr("y", 50) | |
| .attr("width", 20) | |
| .attr("height", 20); | |
| // Update | |
| rects | |
| .attr("x", scale) | |
| .attr("fill", color); | |
| // Exit | |
| rects.exit().remove(); | |
| } | |
| setTimeout(function () { render([1, 2, 2.5], "red"); }, 1000); | |
| setTimeout(function () { render([1, 2, 3, 4, 5], "blue"); }, 2000); | |
| setTimeout(function () { render([1, 2], "green"); }, 3000); | |
| setTimeout(function () { render([3, 4, 5], "cyan"); }, 4000); | |
| setTimeout(function () { render([4, 5], "magenta"); }, 5000); | |
| </script> | |
| </body> | |
| </html> |
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