d3js: D.R.Y. update/enter/exit paragraph with Select input
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December 26, 2015 04:09
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d3js: D.R.Y. update/enter/exit paragraph with Select input
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| <!DOCTYPE html> | |
| <meta charset='utf-8'> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <link rel='stylesheet' href='style.css'> | |
| </head> | |
| <body> | |
| <script type='text/javascript' src='script.js'></script> | |
| </body> | |
| </html> |
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| var data = [1,2,3] | |
| var selectBody = d3.select('body') | |
| var selectInput = selectBody.append('select') | |
| .on('change',addP) | |
| var selectOptions = selectInput.selectAll('option') | |
| .data(data) | |
| var returnD = function (d) { return d;} | |
| selectOptions.enter() | |
| .append('option') | |
| .attr('value',returnD) | |
| .text(returnD) | |
| addP(); | |
| function selectValue() { | |
| return d3.select('select').property('value') | |
| } | |
| function addP() { | |
| var ps = selectBody.selectAll('p') | |
| .data([selectValue()]) | |
| ps.text(returnD) // update | |
| ps.enter() // enter | |
| .append('p') | |
| .text(returnD) | |
| ps.exit().remove() // exit | |
| } | |
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