When did cats pajamas originate?

Excuse me, could you please enlighten me on the origins of the phrase "cats pajamas"? I'm quite intrigued by the history behind this colorful expression. When did it first come into being? Was it coined by a particular individual or group, or did it evolve organically over time? I'm eager to learn more about the etymology of this phrase and its cultural significance. Thank you in advance for shedding some light on this topic.