<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .gaosi{ filter:url("#f1"); } </style> </head> <body> <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" viewBox="0,0,500,500" width="500" height="500" aria-labelledby="title desc"> <title id="title"></title> <desc id="desc"></desc> <defs> <filter id='f1'> <feGaussianBlur in = "SourceGraphic" stdDeviation="15" id="fe"/> </filter> </defs> <image width = "500" height = "500" class = "img gaosi" xlink:href="img/merry-christmas.jpg"></image> </svg> <button id="btn">开关</button> <script> var btn = document.querySelector('#btn'); var img = document.querySelector('.img'); var fe = document.querySelector('#fe'); var x = 15; // btn.onclick = function(argument) { // img.classList.toggle('gaosi') ; // } setInterval(function(){ x--; fe.getAttribute('stdDeviation',x); fe.setAttribute('stdDeviation',x); },100) </script> </body> </html>