目前主流的前端html转pdf方案是通过html2canvas将网页渲染成canvas，再通过jsPDF将canvas转换为pdf。代表方案就是 html2pdf.js，npm包周下载量达到了80万，为广大开发者所接受。但是因为它基于html2canvas和jsPDF，会有一些无法解决的问题，比如：
Such a separation will make the business logic easier to comprehend (and also testable).
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nonetheless a good application of the rule, is the
scanning tools to be flexibly attached and enables dynamic use on