jQuery悬停效果不起作用 [英] jQuery hover effect not working

问题描述

我有动态生成的div标签，看起来像这样:

I have dynamically generated div tags which looks something like this:

<div class="widget widget_1">
    <div class="widget_header widget_header_1"></div>
    <div class="widget_sub_header widget_sub_header_1"></div>
    <div class="widget_content widget_content_1"></div>
    <div class="widget_footer widget_footer_1"></div>
<div>

<div class="widget widget_1">
    <div class="widget_header widget_header_1"></div>
    <div class="widget_sub_header widget_sub_header_1"></div>
    <div class="widget_content widget_content_1"></div>
    <div class="widget_footer widget_footer_1"></div>
<div>

<div class="widget widget_6">
    <div class="widget_header widget_header_6"></div>
    <div class="widget_sub_header widget_sub_header_6"></div>
    <div class="widget_content widget_content_6"></div>
    <div class="widget_footer widget_footer_6"></div>
<div>

这些div标签将根据用户选择生成，因此我不知道它们一次在屏幕上有多少，我只知道它们可以在屏幕上有许多相同的小部件和/或一次在屏幕上显示差异.

These div tabs will be generated based on user selection, so I can't know how many they will have on screen at once, all I will know is that they can have many of the same widgets on the screen and/or difference once on the screen at once.

当我将鼠标悬停在任何这些小部件上时，我试图获得一种悬停效果.我尝试了以下方法，但是将鼠标悬停在.widget上时没有任何反应.

I am trying to get a hover effect when hovering over any of these widgets. I tried the follow, but nothing happens when hovering over .widget.

$(".widget_content").on({
    mouseenter: function () {
        alert("enter");
    },
    mouseleave: function () {
        alert("leave");
    }
});

知道我在做什么错吗?

推荐答案

如果元素是动态添加的，请使用已授权事件方法:

If the elements are dynamically added, use delegated events approach:

$("body").on({
    mouseenter: function() {
        alert("enter");
    },
    mouseleave: function() {
        alert("leave");
    }
}, ".widget_content");

在这里可以使用.widget_content的任何静态父元素来代替body.

Here instead of body you may use any static parent element of .widget_content.

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