+ 1
Something like that?
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<button id='text-blur' onclick='blurText()'>Blur text</button>
<p id='text'> Hello world </p>
</body>
<script>
function blurText(){
text = document.getElementById('text')
text.style.filter = 'blur(5px)'
}
</script>
</html>