element = wd.find_element_by_css_selector('#searchtext') ``` # class属性 选择元素的语法是在 class 值 前面加上一个点: `.class值` ``` elements = wd.find_elements_by_css_selector('.animal') ``` # 子元素 和 后台元素 `元素2` 是 `元素1` 的 直接子元素: ``` 元素1 > 元素2 /...
Let’s write a css selector that will choose the input field after “username”. This will select the “alias” input, or will select a different element if the form is reordered. css=form input.username + input Attribute values If you don’t care about the ordering of child elements, ...
The :first-child selector matches the first child element.:first-child is a Pseudo-class and it applies to any element that is the first child of another element. With :first-child pseudo-class, an element is matched only when it is the first child of another element. For example, p:...
The:first-child selectoris a pseudo-class in CSS that allows you to target the first child element within a parent container. It selects elements that are the first immediate child of their parent. This powerful selector makes it easier to apply unique styles or modifications to that specific...
This CSS tutorial explains how to use the CSS selector called :only-child with syntax and examples. The CSS :only-child selector allows you to target an element that is the only child element within its parent.
所以我们的getCssPath() 函数需要增加参数，允许不使用id属性。此时你调用 getCssPath(document.getElementById("invalid id"), true) 返回的字符串格式是 "body > div:nth-child(4)" ，而不是再是 “#invalid id”。这样，我们就可以使用 document.querySelector ()选中这个元素了。
pseudo-element: 选择具有指定伪元素的元素。例如,::before 和::after 选择在其之前或之后插入内容的项目。 CSS-Selector 的优势包括以下几点: 提高选择效率:CSS-Selector 可以快速选择符合特定条件的元素,而不需要使用 JavaScript 或其他客户端脚本。 提高样式设置能力:CSS-Selector 可以直接对选择出的元素进行样式设...
This CSS tutorial explains how to use the CSS selector called :nth-child with syntax and examples. The CSS :nth-child selector allows you to target an element that is the nth child element within its parent.
HOME HTML CSS CSS Selector nth-child Description Select multiple child elements using nth-child Demo CodeResultView the demo in separate window <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <style id="compiled-css" type="text/css"> .one ul li...
elements = wb.find_elements_by_css_selector('i:nth-child(2)') print(elements) 7、选择父元素的倒数第N个子节点 语法: i:nth-last-child(2) # 7、选择父元素的倒数第N个子节 element = wb.find_element_by_css_selector('i:nth-last-child(2)') ...