d3 graph with limited zoom

Question

I have implemented a d3 line graph which reads data from a CSV file, and then plots multiple lines which react to mouseover events. It works fine with pan and zoom using the

Answer 1

You can simply check the value manually and reset it if it is too high:

if(tx > threshold) { tx = threshold; }

Also, the statements

d3.event.translate;
d3.event.scale;

in your code have no effect.