node.js - Check if strings exists with Puppeteer

Question

I'm trying to use Puppeteer to find if an array of strings exist on a webpage. I'm using this code:

runner.exec(
    'php -r '$translations = include("translations.php"); print json_encode($translations);'',
    function (err, stdout, stderr) {
        var translations = JSON.parse(stdout);
        var values = Object.values(translations);
        const puppeteer = require('puppeteer');

        (async () => {
            const browser = await puppeteer.launch();
            const page = await browser.newPage();
            await page.goto('https://example.com');
            values.forEach(element => {
                try {
                    page.$$eval('body', (elements) =>
                        elements.some((el) => el.textContent.includes(element))
                    );
                } catch (error) {
                    console.log(error);
                }
            })
            await browser.close();
        })();
    }
);

But all I get is

(node:6701) UnhandledPromiseRejectionWarning: Error: Protocol error (Runtime.evaluate): Target closed.
    at /var/www/v4/tests/utils/node_modules/puppeteer/lib/cjs/puppeteer/common/Connection.js:208:63
    at new Promise (<anonymous>)
    at CDPSession.send (/var/www/v4/tests/utils/node_modules/puppeteer/lib/cjs/puppeteer/common/Connection.js:207:16)
    at ExecutionContext._evaluateInternal (/var/www/v4/tests/utils/node_modules/puppeteer/lib/cjs/puppeteer/common/ExecutionContext.js:162:18)
    at ExecutionContext.evaluateHandle (/var/www/v4/tests/utils/node_modules/puppeteer/lib/cjs/puppeteer/common/ExecutionContext.js:151:21)
    at /var/www/v4/tests/utils/node_modules/puppeteer/lib/cjs/puppeteer/common/DOMWorld.js:101:44
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
(node:6701) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict`

Does anyone knows how can I make it work? Thanks

Answer 1

It looks like you are closing the browser before your values.forEach method finishes running. Making it Promise and waiting for it to resolve might solve the problem.