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javascriptcreate-react-appdotenv

Is it possible to use string literals in process.env values?

I would like to add an environment variables with parameters. something like:

URL= https://my-domain.com/test/${value}?code=7NqsdKgBKw

and calculate the value in js.

const value = Math.random();
fetch(process.env.URL);

how can I get the same effect as using literals?

const value = Math.random();
fetch(`https://my-domain.com/test/${value}?code=7NqsdKgBKw`);
Solution

  • For cases that are simple enough (no escaping, only one variable), Node.js has a built-in util.format with printf-style placeholders that’s nice and light:

    URL=https://my-domain.com/test/%s?code=7NqsdKgBKw

    // ESM: import { format } from 'util';
const { format } = require('util');

const urlFormat = process.env.URL;

const value = Math.random();

fetch(format(urlFormat, value))