replace emoji unicode symbol using regexp in javascript

Question

As you all know emoji symbols are coded up to 3 or 4 bytes, so it may occupy 2 symbols in my string. For example \'

Answer 1

Below regex pattern worked for me in java.

"[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]"

As java String uses UTF-16 encoding and as emoji's are above 0xFFFF as well, this regex pattern consider surrogate pairs to identify emojis.