node.js - Javascript循环，异步功能和无头浏览器

通过使用来自Microsoft的新的无头浏览器剧本，我构建了既不返回错误又不返回其他错误的内容。

目前，我的想法已经结束，请您提出一些提示，以指出我的失败。

这段代码应仅启动多个无头浏览器组异步。但是浏览器的启动挂起，应用程序处于无休止的循环。我将代码粘贴到此处，它是一个简单的nodejs脚本，用于重现行为。

感谢您的帮助和阅读；）

const playwright = require('playwright');

log('start playwright async');

let maxRunners = 1;
let running = 0;
let list = [1,2,3,4,5,6,7,8,9,0,11,12,13,14,15];

log('start job');

while (list.length > 0) {

    if (running < maxRunners) {
        log('runner started');
        running++;

        let entry = list[0];
        list.shift();

        log('start browser loop');
        for (const browserType of ['chromium', 'firefox', 'webkit']) {
            log('fire async');
            (async () => {
                log('loop next');
                log('launch: ', browserType);
                const browser = await playwright[browserType].launch({
                    headless: false
                });
                log(browserType, ' launched');
                const context = await browser.newContext();
                log('open new page');
                const page = await context.newPage('http://whatsmyuseragent.org/');
                log('page opened');
                log('make screenshot');
                await page.screenshot({path: `example-${browserType}.png`});
                log('screenshot made');
                log('close browser');
                await browser.close();
                log('browser closed');
                log('loop succeed');

                running--;
            })();
            log('end async');
        }
        log('end loop');

        if (running === 0 && list.length === 0) {
            log('job finished');
        }
    }
}

log('end playwright script');

function log(...msgs) {
    let date = new Date();
    let timeString = date.toISOString().substr(11, 8);
    let msg = '';
    for (let i in msgs) {
        msg += msgs[i];
    }

    console.log(timeString, ':', msg);
}

输出：

20:53:29 : start playwright async
20:53:29 : start job
20:53:29 : runner started
20:53:29 : start browser loop
20:53:29 : fire async
20:53:29 : loop next
20:53:29 : launch: chromium
20:53:29 : end async
20:53:29 : fire async
20:53:29 : loop next
20:53:29 : launch: firefox
20:53:29 : end async
20:53:29 : fire async
20:53:29 : loop next
20:53:29 : launch: webkit
20:53:29 : end async
20:53:29 : end loop