wkhtmltopdf wait for condition before printing

Question

We are using wkhtmltopdf to convert dynamic html pages to pdf. We need to wait until all the ajax requests are finished.

Is there a possibility to delay the printing by a condition?

Extrauterine

I'm guessing there isn't an option for this because it breaks down when you think about it too much. Imagine a page that continuously polls an AJAX endpoint every N seconds, something that is actually very common. Your scenario might not have this but wkhtmltopdf doesn't know that and there's no real way to flag that you have a fixed load path. – Dyl

I don't want wkhtmltopdf to wait my ajax requests, I would need an option to add my wait condition, maybe a script which can tell wkhtmltopdf when to print. – Extrauterine

Answer 1

You can use the --window-status option, see this post on the mailing list.

Roundly

Answer 2

If you can change the javascript code of the webpage then add this line of code to your javascript when you are certain everything is done loading:

if (your_condition_is_met_here){
    window.status = 'ready_to_print';
}

Then pass a flag --window-status ready_to_print to wkhtmltopdf. For example:

wkhtmltopdf --window-status ready_to_print map.html map.pdf

See: wkhtmltopdf javascript delay for output of google maps

Kootenay

Answer 3

You can try using the --javascript-delay option.

Alphanumeric

I want to be sure that every request is finished and I don't want to delay more then needed. So --jvascript-delay is not good. – Extrauterine