“Condom Broke!!”

I know the condom is teared or ripped.

What exactly does it mean when the condom broke while having sex?

(To the point where she has to take Plan B)

If the guy hasn’t cum inside of her (with the condom on) and the condom broke, does that mean the condom only contain pre-cum?

& Is it necessary to take Plan B?

I know it’s a different side of story if he came in her and the condom broke... because he ejaculated inside her.