Selenium JavaScriptExecutor click function works only first time

Question

On the UI I have a checkAll button which is implemented as a span under a div block. clicking it become hard so I used JavaScriptExcutor. I want click it two times. the code is as following 6 lines. the line3 always succeeded, but line 6 always fail silently (no error or exception, but click not happening). if I comment out line 3 then line 6 will function. why? please help me.

IJavaScriptExecutor executor = (IJavaScriptExecutor)drv;
IWebElement chkAll = TaskerStatus.FindElement(By.Id("header3-column0"));
executor.ExecuteScript("arguments[0].click();", chkAll);

cmdBar1collapseAll.Click();
expandAllBtn.Click();
executor.ExecuteScript("arguments[0].click();", chkAll);

I duplicate a line of line 6 (as line 7) then it worked. don't understand why line 6 is now working but has to be there to make line seven work. — Sarah
– Sarah, Commented Nov 30, 2018 at 19:06
correct a mistake in above comment: line 6 is now= line 6 is not — Sarah
– Sarah, Commented Nov 30, 2018 at 19:29
What if you target the element in the js: document.getElementById('header3-column0').click() — pguardiario
– pguardiario, Commented Dec 1, 2018 at 0:07
Hi pguardiario, I tried your suggestion. nothing changes. Thanks anyway. I think I figured out the root cause. — Sarah
– Sarah, Commented Dec 1, 2018 at 19:30

undetected Selenium · Accepted Answer · 2018-11-30 22:22:16Z

2

If I have understood the usecase / issue properly, Line 6 i.e.:

executor.ExecuteScript("arguments[0].click();", chkAll);

fails silently, i.e. no error or exception and the click() not happening as well.

But again if you comment out line 3 i.e. the first instance of:

executor.ExecuteScript("arguments[0].click();", chkAll);

Then line 6 i.e. the second instance of:

executor.ExecuteScript("arguments[0].click();", chkAll);

functions well.

The reason Line 6 is failing because when you invoked click() on the IWebElement chkAll a JavaScript / jQuery might have been active.

Solution

You need to induce WebDriverWait for the IWebElement chkAll to be clickable before you invoke the click at Line 6 and you can update Line 6 as follows:

executor.ExecuteScript("arguments[0].click();", new WebDriverWait(driver, TimeSpan.FromSeconds(20)).Until(ExpectedConditions.ElementToBeClickable(TaskerStatus.FindElement(By.Id("header3-column0")))));

answered Nov 30, 2018 at 22:22

undetected Selenium

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1 Comment

Sarah Over a year ago

Hi DebanijanB, Thank you for your suggestion. I tried your code. it throw a Timeoutexception. it also said the function of ExpectedContidtion is obsoleted. but I know what you mean. the timing sometimes is a problem. I figured out the root cause now. it is because the line4 code. This internal implementation caused the human eye didn't see the button click effect. but it actually did. I have a workaround to resolve it. but Thank you.

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