后台返回txt二进制下载资源，前端读取显示到网页上预览

        async fetchTextFile(txtFileUrl) {
            try {
                this.textContent = '加载中...'
                fetch(txtFileUrl).then(response => {
                    // 检查响应是否成功
                    if (!response.ok) {
                        throw new Error('文件加载失败');
                    }
                    return response.arrayBuffer();
                }).then(buffer => {
                    if(buffer.byteLength){
                        const text = new TextDecoder('gbk',{ignoreBOM:true}).decode(buffer)
                        this.textContent = text.replace(/\n/g,'<br/><br/>');
                    }else {
                        this.textContent = '文件内容为空'
                    }

                }).catch(error => {
                    console.error(error)
                })

            } catch (error) {
                this.textContent = '文件加载失败'
                console.error('错误:', error);
            }
        }```