const regex = /\b(\w+)\b(?=(?:\s*[^\w\s]\s*\w+)+\s*[^\w\s]\s*\b\1\b)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\\b(\\w+)\\b(?=(?:\\s*[^\\w\\s]\\s*\\w+)+\\s*[^\\w\\s]\\s*\\b\\1\\b)', 'gm')
const str = `item1 , test, item3 ;
item4,item5;
test , item6;
alex , alex`;
// 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