const regex = /(?(DEFINE) # Definitions
(?<skip>\#others.*?\#others) # What we should skip
)
(?&skip)(*SKIP)(*FAIL) # Skip it
|
(?<needle>batman\s+(\d+)\s+batman) # Match it/gs;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?(DEFINE) # Definitions
(?<skip>\\#others.*?\\#others) # What we should skip
)
(?&skip)(*SKIP)(*FAIL) # Skip it
|
(?<needle>batman\\s+(\\d+)\\s+batman) # Match it', 'gs')
const str = `#capture
batman 12345 batman
batman 234 batman
batman 35655 batman
batman 1311 batman
#capture
#others
batman 12345 batman
batman 234 batman
batman 35655 batman
batman 1311 batman
#others`;
const subst = `batman new-$3 batman`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions