Update for puppeteer 12, adapted from the current documentation:

page.on('console', async (msg) => {

  const msgArgs = msg.args();

  for (let i = 0; i < msgArgs.length; ++i) {

    console.log(await msgArgs[i].jsonValue());

  }

});



await page.evaluate(() => console.log('hello', 5));

await page.evaluate(() => console.log({ foo: 'bar' }));

await page.evaluate(() => console.log([1, 2, 3, 4, 5]));

Shows the following results:

hello  

5  

{ foo: 'bar' }  

[ 1, 2, 3, 4, 5 ]