Customizing Node.js .env Files

.env files provide a popular solution for defining environment variables, particularly in Node.js. Platforms like Heroku, for instance, use .env files as part of their recommended best practices.

In this post, we’ll look at a simple Node.js application configured via environment variables, and explore how to customize an .env file with new environment variables that override default values.

function getElementByXpath(path) {
return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
};function getElementsByXpath(xpath, parent)
let results = [];
let query = document.evaluate(xpath, parent || document,
null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
for (let i = 0, length = query.snapshotLength; i < length; ++i) {
return results;