javascript - Use superscript in d3 -


how use superscript in d3? have following code:

var counter = 2; textnode.text("event" + counter);// want counter superscript

should use:

textnode.style(args);

to add superscripts?

use select tag , use text set text

d3.select('sup').text("event" + counter)

or if need create 

d3.select('body').append('sup').text("event" + counter)

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