Separate string in groups of 4 in JavaScript

This magic regex will separate a string into groups of 4 characters (or less if in the end the group is smaller)


Output: "1234-5678-910"

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Senior Front-end Software Engineer from Barcelona, Haidong Gumdo Instructor (korean martial art of the sword), street photographer, travel lover, TV addict, Boston Red Sox fan, and privacy advocate.

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