how to add blur background image in html code example

Example 1: how to do a background blur in css

/* Answer to "blur behind element css" */

/*
	This blurs everything behind the element it's applied to
*/

backdrop-filter: blur(10px);

Example 2: how to blur the background image in html

.bg-image {
    /* The image used */
    background-image: url("photographer.jpg");

    /* Add the blur effect */
    filter: blur(8px);
	-webkit-filter: blur(8px);

	height: 100%;
    background-position: center;
}

Example 3: add blur background css

backdrop-filter: blur(5px);