javascript 得到某一节点在父节点中的索引

Posted 2021-05-03

function getIndexOfParentNode(node) {
    let parentNode = node.parentNode
    for(let i = 0; i < parentNode.children.length; i++){
        if (node == parentNode.children[i]){
            return i
        }
    }
    return -1
}

let a2 = document.getElementById("cc")
console.log(getIndexOfParentNode(a2))