Mozilla Developerhttps://developer.mozilla.org/zh-CN/docs/Web/API/Document.getElementsByClassName() var elements = document.getElementsByClassName(names); // or: var elements = rootElement.getElementsByClassName(names); elements 是一个实时 集合 ,包含了找 Web API 接口参考selectors 包含一个或多个要匹配的选择器的 DOM 字符串DOMString。该字符串必须 Document.getElementsByThe getElementsByClassName method of Document interface returns an array-like 仅显示来自 developer.mozilla.org 的更多内容请查看https://developer.mozilla.org/zh-CN/docs/Web/API/Document/getElementsByClassName
Mozilla Developerhttps://developer.mozilla.org/en-US/docs/Web/API/Document: getElementsByClassName() method Learn how to use the getElementsByClassName method to select elements by class name in JavaScript. See syntax, parameters, return value, examples, 更多内容请查看https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName
w3school 在线教程https://www.w3school.com.cn/jsref/met_elementHTML DOM Element getElementsByClassName() 方法 网页更改 class="child" 的 “myDIV” 中所有元素的颜色:. const element = document.getElementById("myDIV"); const nodes = 标记:GetelementsbyclassnameHTML更多内容请查看https://www.w3school.com.cn/jsref/met_element_getelementsbyclassname.asp
W3SchoolHTML DOM Document getElementsByClassName() Method · Learn how to use the getElementsByClassName () method to return a collection of elements with a specified class name (s). See examples, syntax, parameters, return 标记:Getelementsbyclassname MdnGetelementsbyclassname Javascript更多内容请查看https://www.w3schools.com/jsref/met_document_getelementsbyclassname.asp