1.安装turndown

npm i turndown

2.使用trundown并保存为md文件

htmlToMarkdown() {
				let down = new turndown()
				let md = down.turndown(this.html)
				let blob = new Blob([md], {
					type: 'text/markdown'
				})
				let url = URL.createObjectURL(blob)
				let a = document.createElement("a")
				a.href = url
				a.download = 'markdown.md'
				a.click()
				URL.revokeObjectURL(url)
			}

参考：github