Selenium : Call javascript function on page

Question

I'm trying to call an existing javascript function on the page but I'm not getting it.

This is the element I have:

<area shape="rect" coords="513,0,580,66" href="#" onclick="document.f2.submit();">

This is the call:

IJavaScriptExecutor js = driver as IJavaScriptExecutor;
js.ExecuteScript("document.f2.submit()");

Exception:

unknown error: Cannot read property 'submit' of undefined
(Session info: chrome=55.0.2883.87)
(Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 6.1.7601 SP1 x86_64)

How can I perform this operation normally?

looks like the script is executing but document.f2 doesn't point to anything, are you sure that part works when executed in the browser? — acontell
– acontell, Commented Jan 2, 2017 at 11:59
it might be executing too early then, have you tried executing js.ExecuteScript("setTimeout(function() { document.f2.submit(); }, 1000);");? the idea is to execute the script after some time to ensure that everything is "in place" — acontell
– acontell, Commented Jan 2, 2017 at 12:25

acontell · Accepted Answer · 2017-01-02 12:37:54Z

3

It sometimes happens that the script executes too early and some elements in the page are not in place yet (thus giving errors).

The best thing to do in these cases is to execute the script after some time has passed in order to determine that that is really the problem.

js.ExecuteScript("setTimeout(function() { document.f2.submit(); }, 1000);");

After confirming that the problem really is timing, the next thing to do is figure out when to perform the script injection so that the element is in the page and there's no problem (and thus you can remove the setTimeout from the script injection and leave only the operation you wanted to perform initially).

answered Jan 2, 2017 at 12:37

acontell

6,9321 gold badge22 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Selenium : Call javascript function on page

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related