I thought it would be fun to convert hugovk's meow.py to JavaScript.
Demo can be viewed here
import common.js, and meow.js at the least. there's also nope.js that converts to "no" instead of meow.
then simply meowify(inputText) or nopify(inputText)
Here's the above rule put through meowify:
meeeow meooow.me, mew meow.me me mew meoow. meoow'm meow meow.me meow meeeooow me "me" meeeeew me meow.
meow meeeew meeeeow(meeeeOoow) me meeoow(meeooOoow)