const regex = /(?<=asad=).*?(?=(?:&|\n))/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<=asad=).*?(?=(?:&|\\n))', 'g')
const str = `https://teststore.com/products/mens-sandals-black?asad=253485_e1c6ae3ad&ol_color=13968
https://teststore.com/products/womens-sandals-tan-?asad=252485_c1c63c01d&variant=2770725251
https://teststore.com/products/mens-shoes-blue?asad=254325_c1c63c01d
https://teststore.com/collections/men/products/mens-sneakers?variant=310637539&asad=204207_e1c1756d5
`;
// 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