promise-queue.js

// import Queue from 'queue-promise'
const newPage = () => { console.log('newPage called'); }
const window = { lpTag: {} }

// script loading
setTimeout(() => { window.lpTag.newPage = newPage; console.log('script arrived'); }, 1500)

// ************ QUEUE
// const queue = new Queue({
//     interval: 1000,
//     start: false
// });

// // log on start
// queue.on("start", () => { console.log('/* … */ started it') });


// // calling: window.lpTag.newPage()
// queue.add(() => {
//     window.lpTag.newPage()
// })

// // setTimeout(() => { queue.start() }, 2000)


// *********** MIMOSA
const waitUntil = async (condition) => {
    return new Promise(resolve => {
        const interval = setInterval(() => {
            console.log('checking condition', condition);
            if (condition()) {
                console.log('condition passed');
                resolve();
                clearInterval(interval);
            }
        }, 500);
    });
}

waitUntil(() => !!window.lpTag.newPage).then(() => window.lpTag.newPage())