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March 9, 2020 17:17
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Cancelling Events
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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.
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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> | |
| <script> | |
| var data = d3.range(100).map((d)=>{ | |
| return {'cx':Math.random()*450 + 25,'cy':Math.random()*450 + 25} | |
| }) | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", 500) | |
| .attr("height", 500) | |
| var circles = svg.selectAll("circle").data(data); | |
| circles.enter() | |
| .append('circle') | |
| .attr("cx", (d)=>{return d.cx;}) | |
| .attr("cy", (d)=>{return d.cy;}) | |
| .attr("r", 10) | |
| .on('mouseover', handleMouseOver) | |
| .on('mouseout', handleMouseOut) | |
| .on('click', handleClick) | |
| ; | |
| function handleMouseOver(){ | |
| d3.select(this).transition().style('fill', 'red') | |
| }; | |
| function handleMouseOut(){ | |
| d3.select(this).transition().style('fill', 'black') | |
| }; | |
| function handleClick(){ | |
| d3.select(this).style('fill', 'green') | |
| svg.selectAll("circle") | |
| .on('mouseout', null) | |
| .on('mouseover', null); | |
| }; | |
| </script> | |
| </body> |
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