D3 graph shows zero in y axis

Question

Hello i was plotting D3 line graph with brush and zoom

i was able to do it but in y-axis of the graph the values shows zero even after data having some values

and one more problem is mouse-hover even is not firing properly on circles due to pointer-events: all; on .zoom class

adding fiddle here

Answer 1

再将余量设置为60，而不是20，您会很高兴的：）

margin = {top: 20, right: 20, bottom: 110, left: 60},