Mac is boot looping after Mojave update. Can access disk utility. No backup. Can I get the data off it? Mac's are sorta new to me.

I have a friend's MacBook who recently updated to Mojave. It failed and now the Mac won't boot up. Just looping. 

She doesn't have a backup of her data

I can assess the disk utility in the recovery mode. Can I use the to pull the data off the drive into another one safety? Then restore an OS and out the data back on?

It's a MacBook Pro around 2015 or earlier was running Yosemite. There's some important files on the Mac I'm hoping to get out.
Reset the SMC (hold opt control shift and the power button for 20 seconds) then reset the NVRAM 3 times (3 on and off of the lcd monitors backlight) first.

Try to boot into Recovery mode or Internet Recovery (option command and R keys).

Is it looping after the Apple logo has come on the screen? If so then you probably can do what you mention since in that case it's likely a software issue although the drive could be failing. Do you mean the update failed and then the OS wouldn't boot right after?