const regex = new RegExp('entry \\d+: (?:(?!entry \\d+: ).)*special.*?(?=\\s*entry \\d+: |$)', 'gs')
const str = `entry 1: hello
entry 2: world
entry 3: this
is a multiline
that makes it hard
entry 4: here we have a special entry
entry 5: here
we
have
another special entry
in a multiline
entry 6: end`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
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