Ease up the pain with the general update pattern in d3v4.
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October 17, 2016 14:11
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.call(generalpattern)
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| license: mit |
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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; } | |
| textarea { | |
| font-size: 14px; | |
| font-family: monospace; | |
| width: 100%; | |
| height: 90%; | |
| border: none; | |
| margin-left: 2em; | |
| padding-left: 2em; | |
| border-left: #fee solid 4px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <textarea> | |
| function generalpattern(selection, cb) { | |
| var enter = selection.enter(); | |
| if (cb.before) cb.before(selection); | |
| if (cb.enter) enter = cb.enter(enter); | |
| if (cb.exit) cb.exit(selection.exit()); | |
| if (cb.update) cb.update(selection.merge(enter)); | |
| } | |
| // USAGE | |
| svg.selectAll('path').data([…]) | |
| .call(generalupdate, { | |
| enter: function (g) { | |
| return g.append('path') | |
| }, | |
| exit: function (g) { | |
| g | |
| .transition() | |
| .remove() | |
| }, | |
| update: function (g) { | |
| g | |
| .transition() | |
| .attr('d', function (d) {}) | |
| }, | |
| // before: function(g) {…}, | |
| } | |
| });</textarea> | |
| </body> |
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