CSS background-clip property defines the background area for an element to clip the background image, color, or gradient. For example,
div {
 background-clip: content-box;
}
Browser Output
Here, the background-clip property only applies the background to the content-box. The content box only includes the content area and not the padding or border of the element. 
CSS background-clip syntax
The syntax of the background-clip property is,
background-clip: border-box | padding-box | content-box | text | initial | inherit;
Here,
border-box: allows the background to extend behind the border of an elementpadding-box: allows the background to extend inside the border of an elementcontent-box: background is clipped to only the content-box of an elementtext: background is clipped behind only the text of an element
CSS Background-Clip Example
Let's see an example of background-clip with different values. 
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <link rel="stylesheet" href="style.css" />
        <title>CSS background-clip</title>
    </head>
    <body>
        <h2>background-clip: border-box</h2>
        <div class="clip-border">Hello World</div>
        <h2>background-clip: padding-box</h2>
        <div class="clip-padding">Hello World</div>
        <h2>background-clip: content-box</h2>
        <div class="clip-content">Hello World</div>
        <h2>background-clip: text</h2>
        <div class="clip-text">Hello World</div>
    </body>
</html>
div {
    padding: 12px;
    border: 12px dashed;
    text-align: center;
    background-color: orange;
    font-size: 24px;
    font-weight: bold;
}
/*  clip the background area to border-box of the div*/
div.clip-border {
    /* default value */
    background-clip: border-box;
}
/* clip the background area to padding-box of the div*/
div.clip-padding {
    background-clip: padding-box;
}
/* clip the background area to content-box of the div */
div.clip-content {
    background-clip: content-box;
}
/* clip the background area to text background of the div*/
div.clip-text {
    background-clip: text;
    /* support for browser compatibility */
    -webkit-background-clip: text;
    /* set text color transparent and background color remains visible */
    -webkit-text-fill-color: transparent;
}
Browser Output
In the above example, background-clip: text specifies the content to be transparent and the background remains visible only within the text's boundaries.