how to pass a variable to puppeteer page.$eval();

Question

I declared a variable and I am trying to pass it into an eval but it does not get displayed. How can I properly pass a variable.

var now = moment().format('YYYY-MM-D');
await page.$eval('#middleContent_txtEndDate', el => el.value = now);

If I declare a variable inside the eval function it works:

var now = moment().format('YYYY-MM-D');
await page.$eval('#middleContent_txtEndDate', el => el.value = "it works");

Answer 1

You can pass aditional arguments, to $eval

const now = moment().format('YYYY-MM-D');

await page.$eval('#middleContent_txtEndDate', (el, now, foo) => {
   console.log(el, now, foo);
   return el.value = now;
}, now, 'foo');