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June 30, 2017 16:47
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Draw a path when click on the red point
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <html> | |
| <head> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var svgSelection = d3.select("body") | |
| .append("svg") | |
| .attr("width", 500) | |
| .attr("height", 500) | |
| var pointOne = d3.select("svg") | |
| .append("circle") | |
| .attr("cx", 50) | |
| .attr("cy", 50) | |
| .attr("r", 10); | |
| var pointTwo = d3.select("svg") | |
| .append("circle") | |
| .attr("cx", 250) | |
| .attr("cy", 250) | |
| .attr("r", 10) | |
| .style("fill", "red"); | |
| var simplePath = svgSelection.append("path") | |
| .attr("d", "M50 50 L 250 250") | |
| .attr("stroke", "steelblue") | |
| .attr("stroke-width", "0") | |
| .attr("fill", "none"); | |
| var pathTotalLength = simplePath.node().getTotalLength(); | |
| pointTwo.on("click", function() { | |
| simplePath | |
| .attr("stroke-dasharray", pathTotalLength + " " + pathTotalLength) | |
| .attr("stroke-dashoffset", pathTotalLength) | |
| .transition() | |
| .duration(2000) | |
| .attr("stroke-dashoffset", 0) | |
| .attr("stroke-width", "2"); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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