Menu
In Puppeteer you can evaluate async functions:
await page.evaluate(async () => {
// await some promise
});
Is there an equivalent in PuppeteerSharp? Using EvaluateFunctionAsync, the task completes before the promise resolves:
await page.EvaluateFunctionAsync(@"async () => {
// await some promise
}");
516
Async functions can contain zero or more await expressions. Await expressions make promise-returning functions behave as though they're synchronous by suspending execution until the returned promise is fulfilled or rejected. The resolved value of the promise is treated as the return value of the await expression.
The async-await syntax helps with readability, allowing you to write the code as if it were using synchronous call patterns. To enable this method of communication, you'll need to modify your function prototype. In the declaration of the function prototype, before the word function, add the keyword async.
There's no specific need to mark a function async unless you specifically need one of the benefits of an async function such as the ability to use await inside that function or the automatic error handling it provides.
C# Language Async-Await Async/await will only improve performance if it allows the machine to do additional work.
That's the right way, for example:
var six = await page.EvaluateFunctionAsync<int>("async () => await Promise.resolve(6)");
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
