解析base64编码

			let base = result.data.report;    //获取接口返回的数据值
            let newUrl = base.replace(/[\n\r]/g, '');
            let bstr = window.atob(newUrl);
            let n = bstr.length;
            let u8arr = new Uint8Array(n);
            while (n--) {
                u8arr[n] = bstr.charCodeAt(n);
            }
            //确定解析格式
            let blob = new Blob([u8arr], {type: 'application/pdf;base64'});
            let url = window.URL.createObjectURL(blob)
            //在新窗口打开该pdf用这个
            window.open(url)

解析base64编码、查看 下载操作

			let base=''//你要传入的base64数据
			let bstr = atob(base64)
	        let n = bstr.length;
	        let u8arr = new Uint8Array(n);
	        while (n--) {u8arr[n] = bstr.charCodeAt(n);}
	        //确定解析格式，可能可以变成img，没有深入研究
	        let blob = new Blob([u8arr], {type: 'application/pdf;chartset=UTF-8'});
	        let url = window.URL.createObjectURL(blob)
	        //在新窗口打开该pdf用这个
	         window.open(url)
	         //下载dpf用这个
	         const a = document.createElement('a')
	       	 a.href = url
	   	     a.download = name + '.pdf'
	         document.body.appendChild(a)
	         a.click()
	         document.body.removeChild(a)
	         //删除url绑定
	        window.URL.revokeObjectURL(url)