RC strip img uri from full url

imguri.js

const regex = /^(.*product)\/cache.*(\/[a-z]\/[a-z]\/.*)/g;

let testUri = window.prompt('Input the full image url to be cleaned:');

let m;
let uriArr = [];
let cleanUri;

while ((m = regex.exec(testUri)) !== null) {
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }

    uriArr.push(m[1]);
    uriArr.push(m[2]);

    cleanUri = uriArr.join('');
    console.log(cleanUri);
    window.prompt('CTRL+C/CMD+C to copy', cleanUri);
}