Special characters executing javascript code in R

Question

I try to execute a javascript line which runs in JS console which is this:

window.document.querySelectorAll('.atbk[href*="/url"]')

I try to use it with the following script:

startServer()
remDr <- remoteDriver()
remDr$open()
remDr$navigate(a_url)
re <-  remDr$executeScript('return window.document.querySelectorAll('.atbk[href*="/url"]');')

Error: unexpected symbol in "re <-  remDr$executeScript('return window.document.querySelectorAll('.atbk"

Is there any difference in character I should use?

Pierre L · Accepted Answer · 2015-10-27 14:43:33Z

2

Use backslashes to escape the effects of the nested quotes in the string:

x <- "return window.document.querySelectorAll('.atbk[href*=\"/url\"]');"

It may look non-standard in the console, but internally the string is saved without the backslashes. You can check with ?cat:

cat(x)
return window.document.querySelectorAll('.atbk[href*="/url"]');

In case you are still unsure, here's a second test. You can see that \" is saved as one character:

> y <- "\""
> y
[1] "\""
> nchar(y)
[1] 1
> cat(y)
"

edited Oct 27, 2015 at 14:43

answered Oct 27, 2015 at 14:19

Pierre L

28.5k6 gold badges50 silver badges70 bronze badges

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

2 Comments

therin Over a year ago

I tried with the executeScript using this x <- remDr$executeScript("return window.document.querySelectorAll('.atbk[href*=\"/url\"]');") and a new error exists Error in out[[wInd]] : recursive indexing failed at level 3

Pierre L Over a year ago

If you would like to ask a second question about using RSelenium and it's functionality please ask after researching and troubleshooting the specific error you are receiving.

Collectives™ on Stack Overflow

Special characters executing javascript code in R

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related