如何使用 Javascript 选择 Selenium Webdriver 中的最后一个元素？

Question

I create a script to verify that an element is successfully added. The added element always at the end of the page or become last element in different div. I am using selenium webdriver and javascript. Here's HTML code

<div class="row">
<div class="form-group col-sm-2 col-xs-12">
        <label>Entity Name</label>
        <input value="ttax" class="form-control entity-name" disabled="">
</div>
</div>
<div class="row">
<div class="form-group col-sm-2 col-xs-12">
       <label>Entity Name</label>
       <input value="Room" class="form-control entity-name" disabled="">
</div>
</div>

I tried this

let new_entity = await driver.findElement(By.css("div:nth-child(2) > div.form-group.col-sm-2.col-xs-12 > input").last()
let entity_value = await new_entity.getAttribute('value')
expect(entity_value).to.be.eq(entity_name)

But I got error element.last() is not function

Can anyone help me? I can not find references about selenium webdriver in javascript, most of them using java. ss

Answer 1

Here when you want to use the last or first element then we have to get an element array. Instead of findElement, we can use findElements

let new_entity = await driver.findElements(By.css("..")).last();

let entity_value = await new_entity.getAttribute('value'); expect(entity_value).to.be.eq(entity_name);

Answer 2

As the added element always becomes the last element to verify the added element you need to locate the last-child of the parent element which you haven't shown us in the HTML within the question. So to locate the last-child you can use the following css-selectors based Locator Strategy :

• Using css :

   let new_entity = await driver.findElement(By.css("immediateParentTag div:last-child > div.form-group.col-sm-2.col-xs-12 > input"))