从数组中移除父属性?

从子div中删除数据工作很好，但是如何从父数组中删除forEach中的数据?

<div class="parent" data-parent="parentdata">
<div class="child1" data-child="child1data"></div>
<div class="child2" data-child="child1data"></div>
<div class="child3" data-child="child1data"></div>
</div>
<button onclick="myFunction()">Click me</button>

var divsname = Array.prototype.slice.call(document.getElementsByClassName("parent"));
divsname.forEach(function(div){
var clonedDiv = div.cloneNode(true);
Array.from(clonedDiv.querySelectorAll(".parent [data-child]")).forEach((elem) =>     elem.removeAttribute("data-child"));
//How get parent data and remove?

var removedataHTML = clonedDiv.innerHTML;
alert(removedataHTML);
)}

使用document.querySelectorAll()查找.parent节点，并迭代NodeList.forEach()。从父属性中删除该属性。找到具有[data-child]属性的父节点的所有子节点，并从它们中删除该属性。

本例中的CSS为具有data-parent和data-child属性的节点添加颜色。去掉它们就会去掉颜色。

function myFunction() {
document.querySelectorAll('.parent')
.forEach(parent => {
parent.removeAttribute("data-parent");
parent.querySelectorAll('[data-child]')
.forEach(child => {
child.removeAttribute("data-child");
});
});
}

[data-parent] {
color: gold;
}
[data-child] {
color: purple;
}

<div class="parent" data-parent="parentdata">data-parent
<div class="child1" data-child="child1data">data-child</div>
<div class="child2" data-child="child1data">data-child</div>
<div class="child3" data-child="child1data">data-child</div>
</div>
<button onclick="myFunction()">Click me</button>

另一种选择是分别处理父母和孩子。

注意:在这个例子中，我使用dataset属性来处理数据集属性。

function myFunction() {
document.querySelectorAll('.parent[data-parent]')
.forEach(node => {
delete node.dataset?.parent;
});

document.querySelectorAll('.parent [data-child]')
.forEach(node => {
delete node.dataset?.child;
});
}

[data-parent] {
color: gold;
}
[data-child] {
color: purple;
}

<div class="parent" data-parent="parentdata">data-parent
<div class="child1" data-child="child1data">data-child</div>
<div class="child2" data-child="child1data">data-child</div>
<div class="child3" data-child="child1data">data-child</div>
</div>
<button onclick="myFunction()">Click me</button>

您的问题如下:您将)}而不是})。

看看这段代码:

function myFunction() {
var divsname = Array.prototype.slice.call(document.getElementsByClassName("parent"));
divsname.forEach(function(div){
var clonedDiv = div.cloneNode(true);
Array.from(clonedDiv.querySelectorAll(".parent [data-child]")).forEach((elem) => elem.removeAttribute("data-child"));
//How get parent data and remove?

var removedataHTML = clonedDiv.innerHTML;
alert(removedataHTML);
}) // The problem was on this line.
}

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Array iteration test</title>
</head>
<body>
<div class="parent" data-parent="parentdata">
<div class="child1" data-child="child1data"></div>
<div class="child2" data-child="child1data"></div>
<div class="child3" data-child="child1data"></div>
</div>
<button onclick="myFunction()">Click me</button>
</body>
</html>

可以使用element . parentelement

function myFunction(){
var divsname = Array.prototype.slice.call(document.getElementsByClassName("parent"));
divsname.forEach(function(div){
var clonedDiv = div.cloneNode(true);
Array.from(clonedDiv.querySelectorAll(".parent [data-child]")).forEach((elem) =>   {  
elem.removeAttribute("data-child");
if(elem.parentElement.hasAttribute("data-parent")){ //check for the attribute and remove it
elem.parentElement.removeAttribute("data-parent")
}
});
//How get parent data and remove?

var removedataHTML = clonedDiv.outerHTML;
alert(removedataHTML);

output:
<div class="parent">
<div class="child1"></div>
<div class="child2"></div>
<div class="child3"></div>
</div>

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