How to implement masking with jquery

In web development, masking is a common interactive effect. It can pop up when the user performs a specific operation, blocking the operation of the entire page or part of the area, so that the user can only focus on the operation on the pop-up window, improving the user experience. This article will introduce how to use jquery to achieve the mask effect.

1. The implementation principle of masking

The implementation principle of masking is to use the mask layer to cover the target area and adjust its transparency. Through the mask layer, the user cannot perform operations different from those on the mask layer, and can only perform operations on the mask layer.

2. Use jquery to achieve the masking effect

In order to achieve the masking effect, you need to use some methods and events in the jquery library. Here are the steps to implement masking:

1. Create a masking layer

Create an element in html that is the same size as the document and cover it over the entire page or On the target area, set its background color and transparency in CSS to create a mask layer.

<div id="mask"></div>

#mask {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #000;
    opacity: 0.5;
    z-index: 9999;
}

2. Showing and hiding the mask layer

Using jquery's show() and hide() methods, you can quickly add display and hide animations to the mask layer Effect.

$('#mask').show();  // 显示遮罩层
$('#mask').hide();  // 隐藏遮罩层

3. Add a click event to the mask layer

Add a click event to trigger an event when clicking on the mask layer, usually used to hide the mask layer.

$('#mask').on('click', function() {
    $(this).hide();
});

4. Lock and unlock the scroll bar

When the mask layer appears, in order to prevent the user from scrolling the page, the scroll bar needs to be locked. Using jquery's css() method, you can set the overflow attribute of the body element to hidden to achieve the effect of locking the scroll bar.

$('body').css('overflow', 'hidden');  // 锁定滚动条
$('body').css('overflow', 'auto');   // 解锁滚动条

3. Complete code demonstration

The following is a complete mask demonstration code, including all implementation steps.

    
    
    



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    <div id="mask"></div>
    

        
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    <script>
        $(function() {
            $('#open').on('click', function() {
                $('#mask').show();
                $('body').css('overflow', 'hidden');
                $('#popup').show();
            });

            $('#close').on('click', function() {
                $('#mask').hide();
                $('body').css('overflow', 'auto');
                $('#popup').hide();
            });

            $('#mask').on('click', function() {
                $(this).hide();
                $('body').css('overflow', 'auto');
                $('#popup').hide();
            });
        });
    </script>

The above code can implement a simple page, including an open pop-up button and a mask layer. When you click the open pop-up button, a pop-up window with a close button will appear, and the scroll bar will be locked and the mask layer will be displayed. When you click the close button or mask layer, the mask layer and pop-up window will be hidden, and the scroll bar will be unlocked.

4. Summary

This article introduces how to use jquery to achieve the mask effect. By adding a mask layer, showing and hiding the mask layer, adding click events, and locking and unlocking the scroll bar, you can quickly achieve the masking effect. In actual development, the code can be further optimized and expanded according to actual needs to improve user experience and page interaction effects.

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