更改背景图片在rainy.js中不起作用

Question

我从this URL下载了Zip文件。 当我打开默认文件时，它可以工作。 但是，我尝试仅更改背景图像；它没有用，什么也没显示。

错误消息：

• Access to image at 'demo2.html:1 xxx.jpg' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome-extension, edge, https.
• Failed to load resource: net::ERR_FAILED

HTML：

       <script src="./js/rainyday.min.js"></script>
        <script>
            function run() {
                var image = document.getElementById('background');
                image.onload = function () {
                    var engine = new RainyDay({
                        image: this
                    });
                    engine.rain([
                        [3, 2, 2]
                    ], 100);
                };
                image.crossOrigin = 'anonymous';
                image.src = '\myimage.jpg'; //I changed
            }

        </script>

CSS：

.jumbotron {
  padding: 120px 25px;
  text-align: center;
  background-image: url('\myimage.jpg');//I changed
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 0 100%;
  color: #fff;
  text-shadow: 0 1px 3px #000;
}