Is alignment necessary after replacing the front struts?

2002 Honda civic lx 126,000 miles.
Also I have shocks in the back tires. Is it best to replace the front struts & back shocks at the same time? Or is it ok to just do the front if the back is ok?
Either way is alignment vital or Not necessary?

If you use quality parts, set the toe… I've usually sent them out for a check over the years occasionally the toe needs a tweek.

I would

You will disrupt the alignment when you replace the struts. You only need to replace dampeners (shocks or struts) on one axle at a time.