How to make a webpage black and white

How to make the web page black and white? In some special periods, web pages have to remove color and only display black and white. So how do you make your web page black and white? Today I bring you such a tutorial.

To turn a web page into black and white, you need this piece of code.

<style> 
    html { 
        -webkit-filter: grayscale(100%); 
        -moz-filter: grayscale(100%); 
        -ms-filter: grayscale(100%); 
        -o-filter: grayscale(100%); 
        filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);  
        _filter:none; 
    } 
</style>

Put the code before </head> to make the corresponding web page black and gray!

This is how to convert a webpage to black and white.

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