FileSaver.js saveAs视图在Chrome 65中返回'undefined'

Question

之前我已在我的项目中实现了文件管理器，但自从我将其更改为ES6模块后，saveAs将无法运行。从某些调查中，FileSaver函数中的view返回undefined，这会导致函数返回而不保存我的文件。以下是我的称呼方式。 Rasterize和Serialize是从svg which is refactored from here创建blob的函数。

view中的更改是否会归因于汇总过程？

       var rasta = await rasterize(chart);
       saveAs(rasta, `chart.png`);

        }
        function rasterize(svg) { // FROM BOSTOCK via Observable modified for use outside of Observable environment
            let resolve, reject;
            const promise = new Promise((y, n) => (resolve = y, reject = n));
            const image = new Image;
            image.onerror = reject;
            image.onload = () => {
                const rect = svg.getBoundingClientRect();
                const context = d3.create("canvas").attr("height", rect.height).attr("width", rect.width).node().getContext("2d");
                context.fillStyle = "white";
                context.fillRect(0,0,rect.width,rect.height);
                context.drawImage(image, 0, 0, rect.width, rect.height);
                context.canvas.toBlob(resolve);
            };
            image.src = URL.createObjectURL(serialize(svg));
            return promise;
        }
        function serialize(svg) { // FROM BOSTOCK via Observable modified for use outside of Observable environment
            const xmlns = "http://www.w3.org/2000/xmlns/";
            const xlinkns = "http://www.w3.org/1999/xlink";
            const svgns = "http://www.w3.org/2000/svg";

            svg = svg.cloneNode(true);
            svg.setAttributeNS(xmlns, "xmlns", svgns);
            svg.setAttributeNS(xmlns, "xmlns:xlink", xlinkns);
            const serializer = new window.XMLSerializer;
            const string = serializer.serializeToString(svg);
            return new Blob([string], {type: "image/svg+xml"});
        }

更新

似乎如果我将原始FileSaver文件内容粘贴到生成的汇总中，它可以正常工作，那么汇总过程的工作方式就一定存在问题。