How to write hover in jquery

Hover is a commonly used interactive effect in jquery, which can trigger corresponding events when the mouse hovers or leaves. Here's how to write hover in jquery.

1. Using hover for a single element

You can use jquery's hover() method to add mouse hover and leave event handlers for a single element.

$("element").hover(
    function(){
        $(this).addClass("hover");//添加hover类名
    },
    function(){
        $(this).removeClass("hover");//移除hover类名
    }
);

In the above code, we first select an element and then use the hover() method to add an event handler. When the mouse moves into the element, the first function will be executed, which adds the hover class name to the element. When the mouse moves out of the element, the second function will be executed, which removes the hover class name from the element.

2. Using hover for multiple elements

If we need to achieve the hover effect for multiple elements, we can achieve it by traversing each element and then calling the hover() method .

$(".elements").each(function(){
    $(this).hover(
        function(){
            $(this).addClass("hover");//添加hover类名
        },
        function(){
            $(this).removeClass("hover");//移除hover类名
        }
    );
});

In the above code, we first select all elements, then use the each() method to traverse each element, and then call the hover() method to add an event handler.

3. hover abbreviation method

jquery provides us with a convenient method to abbreviate the hover effect. We can use the mouseenter() method to replace the first parameter of the hover() method. Similarly, we can use the mouseleave() method to replace the second parameter of the hover() method.

$("element").mouseenter(function(){
    $(this).addClass("hover");//添加hover类名
}).mouseleave(function(){
    $(this).removeClass("hover");//移除hover类名
});

In the above code, we use the mouseenter() method to add the mouse move-in event handler, the mouseleave() method to add the mouse move-out event handler, and use chain calls to simplify the code.

Summary

Hover is a commonly used interactive effect in jquery, which can trigger corresponding events when the mouse hovers or leaves. jquery provides the hover() method and abbreviation method, which can easily add hover effects to single or multiple elements. When using hover, you need to pay attention to avoid triggering events multiple times to improve performance.

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