I'm trying to get a constraint relaxing to work for my piechart.
It is based on this example https://jsfiddle.net/thudfactor/HdwTH/ but the relaxing method used seems not to work with v4 any more.
The concrete problem is how they access the selection group array directly:
textLabels = labelGroups.append("text").attr( ... );
if(again) {
labelElements = textLabels[0]; <------------- here
textLines.attr("y2",function(d,i) {
labelForLine = d3.select(labelElements[i]);
return labelForLine.attr("y");
});
setTimeout(relax,20)
}
Has it changed with D3 v4.x how you access a selections group array?
How would you go about it now?
In D3 4.0, selections are not arrays anymore. According to the API:
Selections no longer subclass Array using prototype chain injection; they are now plain objects, improving performance.
So, if you console.log(textLabels)
, you're gonna see something like this:
{_groups: Array[1], _parents: Array[1]}
Depending on exactly what are you selecting. From there, you can access your array using textLabels._groups
, for instance.
For having an array, you have to use selection.nodes()
, which, according to the API:
Returns an array of all (non-null) elements in this selection.
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