javascript - How to listen for page element additions
大家讲道理
大家讲道理 2017-07-05 10:48:31
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When dynamically adding elements to the page, how can we trigger an event by judging the length change of the target element?

大家讲道理
大家讲道理

光阴似箭催人老,日月如移越少年。

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巴扎黑

Listen to this eventDOMSubtreeModified.
means that if the child node of the currently monitored element is changed: including deleting a child node, adding a child node, or modifying the content of a child node, this event will be triggered.

var container = document.querySelector(".target") container.addEventListener('DOMSubtreeModified', function () { // do sth }, false);
    大家讲道理

    You add a listening event in the dynamically adding element button, and then when the listening event is triggered, judge the length of the target element, and if there is a change, trigger an event

      大家讲道理

      Can you determine the length of the target element to trigger it after you add the element dynamically?

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