How to add environment variable to html in nodeJS express app?

Question

Say I have an express app:

const app = express();

app.use('/sites', express.static(path.join(__dirname, '/sites')));

And in folder /sites there is index.html.

The html file contains a form that posts to a server address. How can I adapt the URL to which the form posts depending on an environment variable?

For example, is it possible to use a placeholder in index.html that will be replaced by the NodeJS environment variable before sending it as response to the client?

@iRohitBhatia and how would I reference the env variable in the <%= exampleVar %> tag? — Manuel
– Manuel, Commented Oct 18, 2019 at 23:55

Mohammed naji · Accepted Answer · 2019-10-18 23:27:19Z

2

You can use express view templating as a solution, check this link express.js

answered Oct 18, 2019 at 23:27

Mohammed naji

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2 Comments

Manuel Over a year ago

And something more lightweight? Without templating engine?

Mohammed naji Over a year ago

unfortunately you can't

Alwaysblue · Accepted Answer · 2019-10-19 12:27:56Z

1

In continuation to my comment, If you don't mind using templating engine, EJS might be a good alternative

I made a project couple of years back ,when I was learning programming so don't judge the code but that might help you

Anyway to answer your question from comment,

const exampleVar = process.env.exampleVar

app.get("/", function (req, res) {
 res.render("index.ejs", {exampleVar}) 
}

Should probably work

answered Oct 19, 2019 at 12:27

Alwaysblue

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