How to get browser console logs when using Browser library in Robotframework - selenium

Question

I'm using Robotframework and Browser library to automate some tasks on the web. I used to use Selenium, and with selenium there is a way to get the logs, for example in the case of a failure:
driver = webdriver.Remote()
logs = driver.get_log('browser')
I've been struggling to find a way to do the same exact thing using Playwright's Browser library. Is it possible?

Answer 1

Certainly. You can use the page.on('console') event to log what appears in the DevTools console. Here's an example of using debug library to do so.
Make sure to export DEBUG=playwright:console or you won't see anything.
Here's how to do it in JS:
const playwright = require('playwright');
const debugConsole = require('debug')('playwright:console');
(async () => {
const browser = await playwright.chromium.launch({ headless: false });
const context = await browser.newContext();
const page = await context.newPage();
await page.on('console', (msg) => {
if (msg && msg.text) {
if (typeof msg.text === 'function') {
debugConsole('PAGE LOG:', msg.text());
} else {
debugConsole('PAGE LOG:', msg.text);
}
} else {
debugConsole('PAGE LOG:', msg);
}
});
await page.goto('https://example.com', { waitUntil: 'networkidle' });
})();
And in python:
from playwright.sync_api import sync_playwright
def print_args(msg):
for arg in msg.args:
print(arg.json_value())
with sync_playwright() as p:
browser = p.chromium.launch()
page = browser.new_page()
page.on("console", print_args)
page.goto("https://abrahamjuliot.github.io/creepjs/", wait_until="networkidle")
page.wait_for_timeout(5000)
browser.close()
If you are looking for more system-level stuff, there is also a dumpio launch parameter that you can set, which will cause Playwright to provide verbose logs on the actual launch of browser executable.