接下来,我们有item()方法。 classList item() 方法解释 classList 属性的item()方法返回您指定为其参数的索引处的类名。它的工作方式与使用classList[index]检查相同,但指定索引不存在时除外: gams constdiv= document.getElementById("header");console.log(div.classList.item(0));// "navbar"console.log(...
我是一个 DIV 元素 var x = document.getElementById("myDIV").classList.contains("mystyle"); ---返回结果x---true 6.返回类名在元素中的索引值。索引值从0开始---item() 方法:item(index) 描述:如果索引值在区间范围外则返回null 1).实例:获取 元素的第一个类名(索引为0): 我是一个 DIV 元...
CheckedListBox.CheckedIndexCollection CheckedListBox.CheckedItemCollection CheckedListBox.ObjectCollection CheckState 剪贴板 CloseReason ColorDepth ColorDialog ColumnClickEventArgs ColumnClickEventHandler ColumnHeader ColumnHeaderAutoResizeStyle ColumnHeaderConverter ColumnHeaderStyle ColumnReorderedEventArgs ColumnReorderedEve...
DataGridItem DataGridItemCollection DataGridItemEventArgs DataGridItemEventHandler DataGridPageChangedEventArgs DataGridPageChangedEventHandler DataGridPagerStyle DataGridSortCommandEventArgs DataGridSortCommandEventHandler DataKey DataKeyArray DataKeyCollection DataList DataListCommandEventArgs DataListCommandEventHandler Data...
CheckedListBox.CheckedIndexCollection CheckedListBox.CheckedItemCollection CheckedListBox.ObjectCollection CheckState 剪貼簿 CloseReason ColorDepth ColorDialog ColumnClickEventArgs ColumnClickEventHandler ColumnHeader ColumnHeaderAutoResizeStyle ColumnHeaderConverter ColumnHeaderStyle ColumnReorderedEventArgs ColumnReorderedEve...
鸿蒙应用开发（js），点击一个list的item，怎么给这个item添加class
list.insertParagraph("New list item at the start of the list", "Start"); const paragraph: Word.Paragraph = list.insertParagraph("New list item at the end of the list (set to list level 5)", "End"); // Set up list level for the list item. paragraph.listItem.level = 4; // To...
function toggleTheme() { const body = document.body; body.classList.toggle...JavaScript 功能: toggleTheme 函数通过 classList.toggle ...
function toggleTheme() { const body = document.body; body.classList.toggle...JavaScript 功能: toggleTheme 函数通过 classList.toggle ...
Operations for creating new items, and reading/querying all items See Item for reading, replacing, or deleting an existing container; use .item(id).