在JavaScript中,我们可以使用classList属性来获取或操作元素的class属性。classList属性返回一个DOMString对象,该对象包含了元素上所有的class属性值,以空格分隔。 remove方法是classList属性的一个方法,用于从元素的class属性中移除指定的class值。该方法接受一个或多个class值作为参数。当元素的class属性中
以这段代码为例,很显然这是递归函数,里面用到了classList.contains('open') classList.remove('open') classList.add('open')实现了动态添加删除元素类名,而通过类名是否存在的状态来实现递归的树形菜单,非常精髓 四、总结 classList 是一个非常实用的工具,可以让我们轻松地操作元素的类名。在使用 classList 时...
div.classList.remove("foo"); div.classList.add("anotherclass"); // 如果visible被设置则删除它,否则添加它 div.classList.toggle("visible"); // 添加/删除 visible,取决于测试条件,i小于10 div.classList.toggle("visible", i < 10); alert(div.classList.contains("foo")); //添加或删除多个类 ...
问JS IntersectionObserver和ClassList.remove()/add()EN前端开发中经常会遇到大数据量列表展示的性能问题，...
function toggleTheme() { const body = document.body; body.classList.toggle...JavaScript 功能: toggleTheme 函数通过 classList.toggle ...
remove oDiv.classList.remove( 'div3' ); 1. replace oDiv.classList.replace( 'div1' , 'div10' ); 1. toggle 如果classList中存在给定的值,删除它,否则,添加它; // div1 没有 添加 oDiv.classList.toggle( 'div1'); // div4 有 删除 ...
}//classList support for class management//altho to be fair, the api sucks because it won't accept multiple classes at oncevarhasClass, addClass, removeClass;if('classList'indocument.documentElement) { hasClass=function(elem, c) {returnelem.classList.contains(c); ...
//add/remove visible, depending ontestconditional, i less than10div.classList.toggle("visible", i <10);alert(div.classList.contains("foo"));//addorremove multiple classesdiv.classList.add("foo","bar","baz");div.classList.remove("foo","bar","baz");//addorremove multiple classes ...
chemzqm/movearound - Drag and drop element in multiple containers, with dom change support. chemzqm/editable - Simple inline editing with key bindings. chemzqm/list - list view component for model add, remove, filter, sort, reactive etc. chemzqm/tabs - Dynamic tabs component with add, remove ...
getElementById("parent"); //with (...x) Spread Operators // NOTE: toggle not work for multiple classes const multi_classes = ["foo", "bar"]; parentDiv.classList.add(...multi_classes); How to check if element exists and remove or create it var findElement = document.getElementById...