How to use 'express res.sendfile' - JavaScript

How to use 'express res.sendfile' in JavaScript

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googlecolab/backend-container

86 function sendFile(filePath: string, response: http.ServerResponse,
87                   alternatePath: string = "", isDynamic: boolean = false) {
88   var extension = path.extname(filePath);
89   var contentType = CONTENT_TYPES[extension.toLowerCase()] || 'application/octet-stream';
90 
91   getContent(filePath, function(error, content) {
92     if (error) {
93       logging.getLogger().error(error, 'Unable to send static file: %s', filePath);
94 
95       if (alternatePath != "") {
96         sendDataLabFile(alternatePath, response);
97       } else {
98         response.writeHead(500);
99         response.end();
100       }
101     }
102     else {
103       if (isDynamic) {
104         response.removeHeader('Cache-Control');
105         response.setHeader('Cache-Control', 'no-cache');
106       }
107       response.writeHead(200, { 'Content-Type': contentType });
108       response.end(content);
109     }
110   }, isDynamic);
111 }

86	function sendFile(filePath: string, response: http.ServerResponse,
87	alternatePath: string = "", isDynamic: boolean = false) {
88	var extension = path.extname(filePath);
89	var contentType = CONTENT_TYPES[extension.toLowerCase()] \|\| 'application/octet-stream';
90
91	getContent(filePath, function(error, content) {
92	if (error) {
93	logging.getLogger().error(error, 'Unable to send static file: %s', filePath);
94
95	if (alternatePath != "") {
96	sendDataLabFile(alternatePath, response);
97	} else {
98	response.writeHead(500);
99	response.end();
100	}
101	}
102	else {
103	if (isDynamic) {
104	response.removeHeader('Cache-Control');
105	response.setHeader('Cache-Control', 'no-cache');
106	}
107	response.writeHead(200, { 'Content-Type': contentType });
108	response.end(content);
109	}
110	}, isDynamic);
111	}

How to use 'express res.sendfile' in JavaScript

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