javascript - D3 监听 "end"转换事件

Question

我正在学习 D3 并学习本课:https://www.youtube.com/watch?v=EpeOzq8eDYk&index=8&list=PL6il2r9i3BqH9PmbOf5wA5E1wOG3FT22p

为什么 .each("end", function() {...} 会产生这个错误？Uncaught TypeError: callback.call is not a function

var canvas3 = d3.select("#doooo")
                .append("svg")
                .attr("width", 500)
                .attr("height", 500)
var circle3 = canvas3.append("circle")
                .attr("cx", 50)
                .attr("cy", 50)
                .attr("r", 25)

circle3.transition()
    .duration(1500)
    .attr("cx", 150)
    .each("end", function() { console.log("This is producing an error"); })

Answer 1

啊，.each("end", function() {...})(版本 3)似乎已经被 .on("end", .. .) 在版本 4.