const regex = /^([ ])?\[(\/?)gaiarch(=[^"]*)?]([ ])?|([ ])?\[(\/?)gaiarch(=[^"]*)?]([ ])?$/gi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^([ ])?\\[(\\\/?)gaiarch(=[^"]*)?]([ ])?|([ ])?\\[(\\\/?)gaiarch(=[^"]*)?]([ ])?$', 'gi')
const str = `[gaiarch=slider]
[img url="http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/trade_c.png" text="Trading Image" goto="http://www.gaiaonline.com/gaia/bank.php?mode=trade&uid=15388423"],[img url="http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/friend_c.png" text="Friends Image" goto="http://www.gaiaonline.com/friends/add/15388423"][/gaiarch]
[gaiarch=slider][img url="http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/gaiaonline/thread/post/dark-center_bottom_zps419960f4.gif" text="bottom bar"]
[img url="http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/gaiaonline/thread/post/star-say_right_zpsdc3769f3.png" goto="http://www.gaiaonline.com/"][/gaiarch] `;
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