Setting an id issue in d3

Question

So this is what I'm doing:

selection = canvas.selectAll("circle").data(mydata)

            selection.enter().append("circle")

            selection
                .attr("id", function(d, i){ var result = i+''; return result; })

In short, I'm trying to set the id of each element to be a string representation of its index.

However, when I try to access that particular element later by using d3.select("#1") or by using a number variable i and going d3.select("#" + i.toString()) , nothing seems to work.

What am I doing wrong?

Answer 1

我想通了，显然ids不能以数字开头。