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Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →

instance method

Regexp#to_json

to_json(*args)

Returns a JSON string representing self:

Example
require 'json/add/regexp'
puts /foo/.to_json

Output:

Example
{"json_class":"Regexp","o":0,"s":"foo"}
See also #timeout #to_s #source also in 4.0 · 3.4 · 3.2 · 3.1 · 3.0