Node.js Express how do I send response as javascript or other file type

Question

I have code that reads the file example.js and sends it to the client.

app.get('/mods/example.js', (req, res) => {
    fs.readFile('./mods/example.js',
        { encoding: 'utf-8' },
        (err, data) => {
            if (!err) {
                res.send("var example = new Mod();" + data);
            }
        },
    );
});

The problem is how do I send the response as a JavaScript file?

When I open the file in the web browser, it is a HTML file, not a JS file.

Thanks in advance!

Answer 1

As suggested by noisypixy, I used the res.type function to change the type of the response to javascript.

res.type('.js');
res.send("var john = new Human();");

There are a lot of other file types such as html, json, png.

API reference with example code: http://expressjs.com/en/4x/api.html#res.type