I have the test string ti: harry Potter OR kw: magic AND sprint: title OR ti: HARRY
and want the output as
["ti: harry Potter OR kw:", "kw: magic AND sprint:", "sprint: title OR ti:", "ti: HARRY"]
but the output I am getting is
["ti: harry Potter OR kw:", "kw: magic AND sprint:", "nt: title OR ti:", "ti: HARRY"]
It is taking only 2 characters before the colon The regex I am using is
const match = /[a-z0-9]{2}:.*?($|[a-z0-9]{2}:)/g;
and I am extracting it and putting it in an array
I tried replacing it with /[a-z0-9]+:.*?($|[a-z0-9]+:)/g; but when I increase index and add the strings to parsed, it does it weirdly (This is included in code as well)
I tried changing the {2} to n and that is also not working as expected.
const parsed = [];
const match = /[a-z0-9]{2}:.*?($|[a-z0-9]{2}:)/g;
const message = "ti: harry Potter OR kw: magic AND sprint: title OR ti: HARRY";
let next = match.exec(message);
while (next) {
parsed.push(next[0]);
match.lastIndex = next.index + 1;
next = match.exec(message);
console.log("next again", next);
}
console.log("parsed", parsed);
https://codesandbox.io/s/regex-forked-6op514?file=/src/index.js
For the desired matches, you might use a pattern where you would also optionally match AND or OR and get the match in capture group 1, which is denoted be m[1] in the example code.
\b(?=([a-z0-9]+:.*?(?: (?:AND|OR) [a-z0-9]+:|$)))
In parts, the pattern matches:
\b A word boundary to prevent a partial match(?= Positive lookahead to assert what is on the right is
( Capture group 1
[a-z0-9]+:.*? Match any char except a newline as least as possible(?: Non capture group
(?:AND|OR) [a-z0-9]+: Match either AND or OR followed by a space and 1+ times a char a-z0-9 and :| Or$ Assert the end of the string) Close non capture group) Close group 1) Close the lookaheadSee a regex demo.
const regex = /\b(?=([a-z0-9]+:.*?(?: (?:AND|OR) [a-z0-9]+:|$)))/gm;
const str = `ti: harry Potter OR kw: magic AND sprint: title OR ti: HARRY`;
const result = Array.from(str.matchAll(regex), m => m[1]);
console.log(result);