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cellContent: function(d) is called twice for every cell #87

Ths2-9Y-LqJt6 opened this issue Sep 24, 2018 · 2 comments


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commented Sep 24, 2018

when using cellContent(), the function is called twice for every cell. When doing display work (eg make it a certain color) it's safe to do twice, but when doing statics, and for general performance, this is bad.

steps to reproduce:

  1. create a maptable with a cellContent() function.
  2. declare a var before the maptable: var count = 0;
  3. inside your cellContent() function add a line count += 1;

expected: count == number of rows in table
actual: count == 2 x number of rows in table

here's some prototypical code to illustrate the problem:

var rowCount = 0;
var viz = d3.maptable('#vizContainer')
    Key: {
        cellContent: function(d){
            rowCount += 1;
            return d.Key;
function postProcess() {
    console.log('row count: ' + rowCount);

@Ths2-9Y-LqJt6 Ths2-9Y-LqJt6 added the bug label Sep 24, 2018


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commented Oct 22, 2018

Found out that there was a double rendering for table. Fixed on #90


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Contributor Author

commented Nov 14, 2018

about to release 1.7.0, closing this as one of the fixes in that release.

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