克隆元素及其所有事件 [英] Clone element with all its events

问题描述

我在页面中克隆了一个textarea，但是克隆元素没有任何主要元素的事件，有没有办法克隆克隆元素中的所有事件？

I'm cloning a textarea in a page but the cloned element doesn't have any event of the primary element, is there any way to clone all events in cloned element?

var dupNode = node.cloneNode(deep);

推荐答案

你可以使用 getEventListeners 在节点上？不知道支持是怎么回事，或者它是否只在控制台中支持？

You can maybe use getEventListeners on nodes? Don't know how the support is, or if it's only supported in the console?

function cloneMassive(node) {
    // Clone the node, don't clone the childNodes right now...
    var dupNode = node.cloneNode(false);
    var events = getEventListeners(node);

    for(var p in events) {
        // All events is in an array so iterate that array:
        events[p].forEach(function(ev) {
            // {listener: Function, useCapture: Boolean}
            dupNode.addEventListener(p, ev.listener, ev.useCapture);
        });
    }
    // Also do the same to all childNodes and append them.
    if (node.childNodes.length) {
        [].slice.call(node.childNodes).forEach(function(node) {
            dupNode.appendChild(cloneMassive(node));
        });
    }

    return dupNode;
}

---

---

var dupBody = cloneMassive(document.body);

但似乎 getEventListeners 不是真的支持：

使用addEventListener获取附加到节点的事件侦听器

如果需要复制所有事件属性节点，你需要一个所有的列表，然后简单地复制它们：

If you need to copy all event properties on the node as well you will need a list of all, and then simply copy them over:

['onclick', 'onmouseover', '...'].forEach(function(method) {
    dupNode[method] = node[method];
});

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