查找没有特定类名的元素

问题描述

这与我之前提出的问题相同- Watir Webdriver；计算具有变化的类名的元素.我能够使用类名称asset-card selectable添加特定数量的元素.

This is in the same vein as this question I asked before - Watir webdriver; counting elements with changing class names. I was able to add the specific number of elements based on using the class name asset-card selectable.

当前，我希望单击更多元素以将它们添加到现有集中.这是我的困境:

Currently, I am looking to click on more elements to add them to the existing set. Here is my dilemma:

• 未单击元素 时，类名称为:
  image-card asset-card selectable
• 单击元素时，将selected附加到类名:
  image-card asset-card selectable selected

• When an element is not clicked, the class name is:
  image-card asset-card selectable
• When an element is clicked, selected is appended to the class name:
  image-card asset-card selectable selected

就我而言，我正在尝试寻找仅 说image-card asset-card selectable并且不包括selected的其他元素.我不确定如何明确找到它们.

In my case, I am trying to look for additional elements that only say image-card asset-card selectable and do not include selected. I am not sure how to explicitly locate them.

是否有正则表达式解决方案或有关如何实现此目的的其他想法?

Is there a regex solution or any other thoughts on how to approach this?

推荐答案

查找没有特定类的元素的最简单方法是使用:css定位符.

The easiest way to find an element without a certain class is to use a :css locator.

browser.divs(css: 'div.image-card.asset-card.selectable:not(.selected)')

CSS选择器的说明:

An explanation of the CSS-selectors:

• div-这是您要匹配的元素的标签名称
• .image-card.asset-card.selectable-这是您希望匹配元素具有的类的列表
• :not(.selected)-这是您不希望拥有匹配元素的类的列表

• div - This is the tag name of the elements you are trying to match
• .image-card.asset-card.selectable - This is the list of classes you want the matching elements to have
• :not(.selected) - This is the list of classes you do not want the matching elements to have

如果您反对CSS选择器，则可以遍历元素.请注意，这将变慢，因为它必须对浏览器进行更多调用.

If you are opposed to CSS-selectors, you could iterate over the elements. Note that this will be slower as it has to make more calls to the browser.

selectable = browser.divs(class: 'image-card asset-card selectable')
unselected = selectable.reject { |e| e.class_name.split(' ').include?('selected') }

我之前曾尝试使用正则表达式(请参见我的博客文章)，但是它变得非常混乱.我不建议那样走.

I have tried to use a Regular Expression before (see my blog post), however it gets pretty messy. I would not recommended going that way.

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