I’m trying to capture key:value pairs inside curly brackets. For the following string it should return something like k2:v2 and k3:v3
Str = “k1:v1abc{k2:v2,k3:v3}{test}”
I have the following regexes which capture what I need individually, but I don’t know how to combine them together.
/(\w+):(\w+)/g >>> Captures key:value
/{.*?}/g >>> Captures everything between {}
If your environment supports a quantifier in a lookbehind assertion:
(?<={[\w:,]*)\w+:\w+(?=[\w:,]*})
The pattern matches:
(?<={[\w:,]*) Positive lookbehind, assert { and optional repetitions of the allowed chars to the left\w+:\w+ Match 1+ word chars : and 1+ word chars(?=[\w:,]*}) Positive lookahead, assert optional repetitions of the allowed chars to the right and }See a regex demo.
const str = "k1:v1abc{k2:v2,k3:v3}{test}";
const regex = /(?<={[\w:,]*)\w+:\w+(?=[\w:,]*})/g;
console.log(str.match(regex));Another way could be using 2 passes, first matching the format and get the part between the curly braces in a capture group.
If there is a match, split group 1 on a comma.
{(\w+:\w+(?:,\w+:\w+)*)}
The pattern matches:
{ Match opening {( Capture group 1
\w+:\w+ Match 1+ word chars : and 1+ word chars(?:,\w+:\w+)* Optionally repeat a , and the same previous pattern)} Match closing }const str = "k1:v1abc{k2:v2,k3:v3}{test}";
const regex = /{(\w+:\w+(?:,\w+:\w+)*)}/;
const m = str.match(regex);
if (m) console.log(m[1].split(","));