uni-app打包微信小程序打开doc等文档文件的方法

//resume是一个json，suffix是后缀名，src是文件服务器地址
<image v-if="resume.suffix === 'pdf'" mode="aspectFill" class="uni-uploader__img" src="/static/img/approval/pdf.png" :data-src="resume.url" @tap="previewDocument"></image>
<image v-else-if="resume.suffix === 'doc' || resume.suffix === 'docx'" mode="aspectFill" class="uni-uploader__img" src="/static/img/approval/word.png" :data-src="resume.url" @tap="previewDocument"></image>
<image v-else-if="resume.suffix === 'xls' || resume.suffix === 'xlsx'" mode="aspectFill" class="uni-uploader__img" src="/static/img/approval/excel.png" :data-src="resume.url" @tap="previewDocument"></image>
<image v-else-if="resume.suffix === 'ppt' || resume.suffix === 'pptx'" mode="aspectFill" class="uni-uploader__img" src="/static/img/approval/ppt.png" :data-src="resume.url" @tap="previewDocument"></image>
<image v-else mode="aspectFill" class="uni-uploader__img" src="/static/img/work/record.png" :data-src="resume.url" @tap="downloadFile"></image>

js：

            previewDocument: function(e) {
				var current = e.target.dataset.src
				uni.showLoading({
					title: '正在加载文件...',
					mask: true
				})
				uni.downloadFile({
					url: current,
					success: function(res) {
						uni.hideLoading()
						let filePath = res.tempFilePath
						uni.openDocument({
							filePath: filePath,
							success: function(res) {
								console.log('打开文档成功')
							},
						});
					},
					fail() {
						uni.hideLoading()
					}
				});
			},
			downloadFile: function(e) {
				uni.showToast({
					title: '该类型附件不支持查看',
					icon: 'none',
					mask: true,
					duration: 3000
				})
			},