[Feature] page.$: add waitForSelector as optional parameter

[Ank2503]

Is it possible to add optional parameter in page.$ to wait for selector first, than perform searching, another words replacing
await page.waitForSelector('selector'); await page.$('selector');
with
await page.$('selector',{waitFor: true});
or something like it, because for my tests $ or $$ functions sometimes return undefined

[JoelEinbinder]

waitForSelector returns the selector, so you can just do

const handle = await page.waitForSelector('selector');
await handle.click();