regex - Regular expression match issue -

i have simple regular expression: .} , simple text: {}}

why single match:

• {}

i expecting two:

• {}
• }}

please see here code snippit.

regex matches non-overlapping. maybe closer want:

/(?=})}/g 

i think want behind not ahead isn't supported on regexr.com because it's not supported in java script

/(?<=})}/g