This might be a repeat, but I can't find an answer for my particular use case. I have a react app created using npx create-react-app app and a .env file in my root directory. Appending "REACT_APP" to my variables don't register under process.env, with the only variables being registered are FAST_REFRESH: true, NODE_ENV: "development", PUBLIC_URL: "", WDS_SOCKET_HOST: undefined, WDS_SOCKET_PATH: undefined, and WDS_SOCKET_PORT: undefined. How do I access the environment variables in my .env file?
Here are my vars:
REACT_APP_SERVICE_ID="service"
REACT_APP_TEMPLATE_ID="template"
REACT_APP_VAR="show"
I had the same problem: Only the predefined env variables were printed, my custom variables – although prefixed with REACT_APP were printed as undefined in dev mode when I tried to get them with process.env.REACT_APP_MYVAR.
Stopping the local host and starting the app once again with 'npm start' fixed the issue.
Here are the docs for adding custom environment variables: https://create-react-app.dev/docs/adding-custom-environment-variables/.
It should be as simple as process.env.REACT_APP_SERVICE_ID.
you don't need explicit define that my variable is string or number etc .env do it himself first you can access it using
process.env.REACT_APP_SERVICE_ID
or a better way is to create a config.js file and inside you export all the .env variables like this
export default {
SERVIVE_ID: process.env.REACT_APP_SERVICE_ID,
TEMPLATE_ID: process.env.REACT_APP_TEMPLATE_ID,
VAR: process.env.REACT_APP_VAR
};
after that import, it and you are good to go.
I am making a react app with firebase and I want to use environment variables for the firebase config.
this is the firebase config in my react apps src folder
import firebase from "firebase"
import "firebase/auth"
console.log(process.env)
const config = {
//private stuff
};
// Initialize Firebase
firebase.initializeApp(config);
firebase.analytics();
export default firebase
the issue is with that console log, I am using that for debugging, it is logging
NODE_ENV: "production"
PUBLIC_URL: ""
WDS_SOCKET_HOST: undefined
WDS_SOCKET_PATH: undefined
WDS_SOCKET_PORT: undefined
when it should be logging
NODE_ENV: "production"
PUBLIC_URL: ""
WDS_SOCKET_HOST: undefined
WDS_SOCKET_PATH: undefined
WDS_SOCKET_PORT: undefined
GOOGLE_API_KEY: "key"
why aren't my custom environment variables showing up? I am using AWS amplify for deployment so that is what would be providing the environment variables.
https://create-react-app.dev/docs/adding-custom-environment-variables/
Your project can consume variables declared in your environment as if
they were declared locally in your JS files. By default you will have
NODE_ENV defined for you, and any other environment variables starting
with REACT_APP_.
Note: You must create custom environment variables beginning with
REACT_APP_. Any other variables except NODE_ENV will be ignored to
avoid accidentally exposing a private key on the machine that could
have the same name. Changing any environment variables will require
you to restart the development server if it is running.
create .env file in your root where package.json located.
make variable name with REACT_APP_customName/cofigString
replace the values with the variable (2)
save both files
check the project
** Make sure your .env file is in the root directory, not inside src folder.
I have a .env file set up in my project
But when i console.log it i can only see the following object
{
"NODE_ENV": "development",
"PUBLIC_URL": ""
}
I tried using .env.local but the problem persists. I used create-react-app to bootstrap the react application
All your custom environment variables need to have the prefix REACT_APP_.
Like this:
REACT_APP_GOOGLE_MAP_KEY = asdfdtgsg34qrgaerg
More about environment variables with create-react-app
You many be missing any one of this
The env file should be in your root (not in src)
the env variable name should be prefixed with REACT_APP_
You need to restart the server to reflect the changes.
After that you can access the variable like this process.env.REACT_APP_SOME_VARIABLE in your CRA app
So I have a file named .env with the following contents
NODE_PATH=./src
NODE_ENV=what
TEST=test
And I am calling that in my index.js in my react app.
require("dotenv").config();
console.log(process.env);
...
shows the following output
NODE_ENV: "development"
PUBLIC_URL: ""
I thought maybe I declared another .env file somewhere else, but thats not the case. I searched my project for the PUBLIC_URL and it's not located anywhere in my project. I don't even know what else to check at this point.
In react code you have to compile the environment variables in at, well, compile time because at run-time there it is only possible to access a fake process.env object. Unless you are using server side rendering.
See also: Passing environment-dependent variables in webpack
If you're using CRA then you'll need to do: REACT_APP_TEST=test and reload the dev server to have it show up as expected in your app.
If you have used create-react-app for bootstrap your project then you have to use environment variables like REACT_APP_NODE_ENV=development.
After adding any new environment variable, you have to restart the development server.
I am building a react app and i need to fetch data from my api, now i want to store the api url as an environment variable. I have my .env file, i have dotenv installed, here is my code process.env.API_URL is returning undefined.
import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import Home from '../src/components/Home'
import dotenv from 'dotenv'
import path from 'path'
class App extends Component {
render() {
console.log(process.env.API_URL)
return (
<div>
<Home/>
</div>
);
}
}
export default App;
Three things to note here
the variable should be prefixed with REACT_APP_
eg: REACT_APP_WEBSITE_NAME=hello
You need to restart the server to reflect the changes.
Make sure you have the .env file in your root folder(same place where you have your package.json) and NOT in your src folder.
After that you can access the variable like this process.env.REACT_APP_SOME_VARIABLE
Additional tips
No need to wrap your variable value in single or double quotes.
Do not put semicolon ; or comma , at the end of each line.
Read more here(my own post) and the official docs
You will probably need to call dotenv.config() as suggested by the document
If you are using create-react-app, you don't need dotenv package. You will need to add REACT_APP_ prefix to the variable name in .env file. See the document here
when calling a .env variable from a JS file
you need to call it by process.env. prefix before you write the .env variable
thus it would look like process.env.REACT_APP_NOT_SECRET_CODE
and do not forget to start your variable name by REACT_APP_ prefix as mentioned in previous answers, otherwise react will ignore it for security reasons.
Add prefix REACT_APP_ on React environment variables.
apiKey: process.env.REACT_APP_API_KEY
Make sure .env file is in the root directory.
src/
.env
.gitignore
package.json
package-lock.json
Restart the development server after making changes in .env file.
Copy only the value inside the quotation marks and don't forget to remove trailing commas(It haunted me for several hours). These examples will give you an error.
REACT_APP_API_KEY=Ach2o1invVocSn25FcQhash209,
REACT_APP_API_KEY="Ach2o1invVocSn25FcQhash209",
REACT_APP_API_KEY="Ach2o1invVocSn25FcQhash209"
Make sure you used the prefix REACT_APP on every variable
Confirm that the variable names on the .env file match the ones on
your js file.For example,REACT_APP_KEY in .env versus
process.env.REACT_APP_KY
If the development server was running, stop it then rerun using npm
start it. I really struggled with this (variable is an undefined error).
Every time you update the .env file, you need to stop the server and
rerun it, as the environment variables are only updated during build
(variable is an undefined error).
Remove quotations from the values of the variables.
// Wrong:
REACT_APP_KEY=”AHEHEHR”
// Right:
REACT_APP_KEY=AHEHEHR
restart the vscode (close the project, close the editor)
open it again
launch the project
In my case it help a lot. Also remember to start the name of your key with REACT_APP_YOUR_NAME_KEY
If the above solutions don't work for you then please check where is your ".env" file place.
Like in my case everything I had done correctly but the mistake is I had placed the ".env" outside my project directory due to which I'm getting error.
Note: Your ".env" file should be in the same directory in which your "package.json" is.
Hey thanks guy what i did and worked was create a config.js file
const dev={
API_URL:"http://localhost:300"
}
const prod={
API_URL:"llll"
}
const config=process.env.NODE_ENV=='development'?dev:prod
export default config
Then i import wherever maybe in a component and get my data.
Another possible trap in which I fell was to define the variables not under the create-react-app folder but one above(where the Node server/backend .env is located). Make sure you don't do that because you will waste precious time, as I did today.
Solution:
1.Remove double quotation.("...").
2.Prefix Must be REACT_APP on every variable.
Right way:
REACT_APP_API_URL=http://localhost:8002
I hope its work.
In my case I started with naming the file process.env. As it happen and as the doc clearly states, the file should simply be named .env
try by clearing the cache also.
npx react-native start --reset-cache
FIX:
in babel.config.js, if you're using the optional configuration:
{
"plugins": [
["module:react-native-dotenv", {
"moduleName": "#env",
"path": ".env",
"blacklist": null,
"whitelist": null,
"safe": false,
"allowUndefined": true
}]
]
}
you should then import:
import {API_URL, API_TOKEN} from "#env"
instead of:
import {API_URL, API_TOKEN} from "react-native-dotenv"
the NPM Package description itself has this inconsistency
DO NOT STORE OR USE API KEYS IN FRONTEND CODE SINCE IT IS EASILY READABLE THROUGH DEV TOOLS
Saving API keys in .env and using them in your React app will still be unsecured since the API key can be read from DevTools.
Use some simple backend code that will act as a proxy to your service.
Send required data through a request and then the backend should use that data including the API key stored on the backend, and then make a request to some particular service that needs that API key.
No need to prefix it with REACT_APP_, just identify your environment -
if you are on development environment (npm start), you should be adding an environment variable in .env.development like - API_URL=http://example.com
if you are on production environment, updating .env should work
Then use the same in your JS file as process.env.API_URL
Note: I've tested this on React JS v16.8
If you are using dev server on localhost know this that .env doesn't work here, you need to deploy website on "normal" server, it is a safety reason to not allow browser to see .env in staging
I investigated a couple of options on how to set environment-specific variables and ended up with this:
You can directly use the dotenv-webpack(npm install dotenv-webpack --save) available in webpack to have access to any environment variable.
You just have to declare the plugin in your webpack.config.js file:
const path = require('path')
const Dotenv = require('dotenv-webpack')
module.exports = {
/*...*/
plugins: [
new Dotenv()
]
}
Just create the .env file in your root directory and set the variables there,
REACT_APP_API_URL=https://localhost:8080/api
REACT_APP_LOG_PATH=/usr/share/
Then you call it in your js file in the following way:
process.env.REACT_APP_API_URL
process.env.REACT_APP_LOG_PATH
I just found that I used different names for the variables :)
Also make sure that when you enter process.env.REACT_APP_YOURVARIABLE, your IDE don't add at the top of your file:
import process from "process";
This was my problem, I received undefined until I removed the accidentally added import