D3聽「結束」過渡

Question

我學習D3並按照這一課的事件：https://www.youtube.com/watch?v=EpeOzq8eDYk&index=8&list=PL6il2r9i3BqH9PmbOf5wA5E1wOG3FT22p

爲什麼.each("end", function() {...}產生這個錯誤？ 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() {...})（第3版）似乎版本已換成.on("end", ...) 4.