dialog.js

alert, prompt, confirm but async

Features

alert(), prompt() and confirm() are API-compatible but async.
Uses native Dialog-Element (polyfill here: https://github.com/nuxodin/dialog-polyfill)
Unstyled, style it yourself!
Lightweight

<button onclick="module.alert('Just a test').then(console.log)">run</button>

:where(.\:modal, :modal) {
    box-shadow: 0 0 1rem #0008;
    border: 0;
    border-radius: .3rem;
}

import * as module from "https://cdn.jsdelivr.net/gh/u1ui/dialog.js@x.x.x/dialog.min.js"

To get sure your lib works even if the script does not load, you can fallback to the native confirm/alert/prompt function.

const {confirm} = await import('../fails/dialog.js').catch(e=>window);
await confirm('test');