RSelenium 无法在带有下拉菜单的页面上找到元素

Question

我正在尝试从使用下拉列表的表中抓取一些数据。该表是“GIC 选项”。 “期限”是“中期”，“兴趣类型”是“复合”。

看着SO答案here，我试过了：

library(RSelenium)
remDr <- remoteDriver(port = 4445L)
remDr$navigate("https://www.nbc.ca/personal/savings-investments/gic/non-redeemable.html")
webElem <- remDr$findElement(using = "xpath", '//*[@class="ft2-dropdown-list-element"]/option[@value="Mid-Term"]')

还有一个css版本

webElem <- remDr$findElement(using = "css", "#ft2-filterDropdownBtnID option[value='Mid-Term']")

两个结果都是Selenium message:Unable to locate element

如何抓取此表中的数据？

Answer 1

在我的解决方案之下。

library(RSelenium)
driver <- rsDriver(browser=c("firefox"),port = 4445L)
remote_driver <- driver[["client"]]  
remote_driver$navigate("https://www.nbc.ca/personal/savings-investments/gic/non-redeemable.html")

#Active the box by a click
remote_driver$findElement(using = "css selector", '.ft2-dropdown-btn-label')$clickElement()

#Now you can choose what you need
remote_driver$findElement(using = "xpath", '//*[@id="ft2"]/div[2]/div/ul/li[3]/a')$clickElement()

#All
//*[@id="ft2"]/div[2]/div/ul/li[1]/a
#Short term
//*[@id="ft2"]/div[2]/div/ul/li[2]/a
#Mid term
//*[@id="ft2"]/div[2]/div/ul/li[3]/a
#Long term
//*[@id="ft2"]/div[2]/div/ul/li[4]/a

#To scrape the value of the table, below a possible solution.
webElem <- remote_driver$findElement(using = "css selector", 'div.table-wrapper:nth-child(4) > table:nth-child(1)')
webElem$getElementText()