const regex = /(?:^|[])] +)(?P<title>\w+)(?: +[[【(]|$)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:^|[])] +)(?P<title>\\w+)(?: +[[【(]|$)', 'gm')
const str = `(event) (tag) [group (artist)] title (form) [addition1] [addition2]
(event) [group (artist)] title (form) [addition1]
[event] [group (artist)] title (form) (addition1)
(tag) [group (artist)] title
[group (artist)] title
title
【tag】 [group (artist)] title 【form】
[group (artist)] title
[group] title
[artist] title
(artist) title
`;
// 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