when I create a .env.local file in my project root, it's not setting up properly.
in the file, I have my API key like so
API_KEY=SOME_API_KEY
Then when i try to access it in getServerSideProps with process.env.API_KEY, it doesn't work. When I console.log(process.env.API_KEY) i get undefiend. Which I assume is because the file isn't set up properly?
I even tried installing dotenv but I know you don't need that with Next.js.
next config file
module.exports = {
reactStrictMode: true,
}
You’ll notice that the browser will log undefined. This happens since the environment variable is only defined on our server so far.
Since Next.js 9.4, Next.js will make all environment variables that start with NEXT_PUBLIC_ available to the client without any further configuration!
Create .env (all environments), .env.development (development environment), .env.production (production environment), .env.local (local enviroment)
Add the prefix NEXT_PUBLIC_ to all of your environment variables.
NEXT_PUBLIC_BASE_URL=http://localhost:3000/
Use with prefix process.env
process.env.NEXT_PUBLIC_BASE_URL
Stop the server and restart it:
npm run dev
OR
yarn dev
.env.local works with +v9.4.
if you are using older version please try with next config file https://nextjs.org/docs/api-reference/next.config.js/environment-variables.
Note:
Next.js will replace process.env.customKey with 'customKey' at build time. Trying to destructure process.env variables won't work due to the nature of webpack
Restarting the server solved it for me as in #Igmer Rodriguez comment above .
Related
I'm in WSL2, and my react app does not update any changes at all, only updates when re-running "npm start"
I've tried "npm install react-dotenv" and creating an .env file with
FAST_REFRESH=false
CHOKIDAR_USEPOLLING=true
doesn't work
tried in the package.json
"start": "CHOKIDAR_USEPOLLING=true react-scripts start"
doesn't work
any suggestions? I don't even mind manually refreshing the browser, it's just that it won't update unless I restart the whole thing.
You do not have to install an additional dotenv package since Create-React-App already supports environment variables natively. However if you use environment variables, you need to prefix them with REACT_APP. e. g. REACT_APP_MY_VARIABLE.
Also note: Whenever you update an environment variable you have to restart the app.
Take a look at the official CRA docs.
Now for the reloading problem. There are a couple of possible solutions:
Add a .env file to your project without third party package and
define a variable named FAST_REFRESH=false. (CRA advanced
configuration)
If you are using a Virtual Machine try adding CHOKIDAR_USEPOLLING=true to your .env file.
There is another common problem in CRA ^17.0.1 with hot reloading (Github issue - Hot Reload stopped working with React "^17.0.1")
if (module.hot) module.hot.accept();
Finally (and this is the most likely solution in my opinion) try to move your project folder to somewhere, where npm can automatically recompile in WSL. E. g. move project from your desktop to your actual home directory.
I have added a .env file to my root folder and added the below variable.
REACT_APP_API_URL=http://localhost:4000
I have used this in a component as below.
process.env.REACT_APP_API_URL
After adding the above, I have restarted the reactJS application and run the application via npm start. I see the below message in the console, but still, the variable gives an undefined value.
ready - started server on 0.0.0.0:3000, url: http://localhost:3000
info - Loaded env from D:\ReactJsProj.env
info - Using webpack 5. Reason: no next.config.js https://nextjs.org/docs/messages/webpack5
it seems you just want to change your port, not the whole app url. so just do this in your .env file:
PORT=4000
and then restart the dev server. it will do the job!
In nextjs you should add env variables in .env.locale
I am trying to add .env file and variables but I am unable to access any variable. I am using React Biolerplate Code.
I am following this React Docs File.
I have added one .env file in my root folder like this:
REACT_APP_SECRET_NAME=secretvaluehere123
And I am trying to access this using this code:
<small>You are running this application in <b>{process.env.NODE_ENV}</b> mode.</small>
I am getting NODE_ENV as development but when I am trying to access:
REACT_APP_SECRET_NAME
I can't access it.
Mine react boilerplate is using:
cross-env NODE_ENV=development
in the start command.
I removed (cross-env NODE_ENV=development) from package.json but it is not working. I tried solutions from this answer: Possible answer.
According to React Docs it should work. I want to add api_url for local it should be x and for the production, it should be y:
The following issue from React Boilerplate seems to suggest a working solution:
Install env-cmd, a node module
Update your start script to use it:
{
start: "cross-env NODE_ENV=development env-cmd node server"
}
This should work if your .env is in the root folder as you've said.
Otherwise, you can specify the path of .env by doing so
{
start: "cross-env NODE_ENV=development env-cmd -f ./custom/path/.env node server"
}
I assume you are trying to access your .env variables inside index.html, if so then syntax is a bit different that in render function. Try to access it like this.
%REACT_APP_SECRET_NAME%
It looks like you're looking at two types of React starters:
React Boilerplate
Create React App
These aren't the same. I don't know React Boilerplate, but I'm not sure if they provide the same environment variables strategy with .env files as Create React App does.
Maybe have a look at the dotenv Node package and perhaps you can add that to your project. I think (not 100% sure) that Create React App uses the same one.
Seems like you have everything right. Just remember to restart your development server every time you change information in your .env file.
Also, your .env file needs to be in the root directory of your react app. You can find all this information in the React Docs - Adding Development Environment Variables In .env
Im tring to build my ReactApp using an environment variable system.
Following online guides, I've create two different files
.env.developtment and .env.production
using the syntax for variables:
REACT_APP_BASE_SERVER_URL=myapp/
During development (using npm start to start the server), development file is loaded perfectly and all variable are stored in process.env global.
Unfortunally after compiling it with webpack, process.env is empty.
Im compiling my code with:
./node_modules/.bin/webpack --config webpack.config.js --env.production --progress --env.NODE_ENV=production --colors
and in my webpack there is no process.env override (using DefinePlugin is the common mistake).
Following a similar question on this site, I've tried to put this command in the config to avoid any process override:
node: {process: false}
but with this process.env will be totally undefined instead of empty ( {} ).
Is it possible to use this kind of environment system or .env files are only supported with npm build?
Sending the env as an argument does not set the application environment. Said so, I considering you are doing it inside your config. What would set up few env values is the option mode as development or production, which is available on webpack4 (You do -p or -d for the previous versions).
I dont know why you said using webpack.DefinePlugin is a common mistake. I have been using it and it works very well.
In last case, if you are sure you process.env should not be empty I would suggest you to do the syntax process.env["expected_attr"].
In my gatsby-config.js I've used the dotenv package to set env vars
require("dotenv").config({
path: `.env.${process.env.DEPLOY_ENV}`,
});
and then in my package.json a script to deploy to different environments
"deploy:staging": "DEPLOY_ENV=staging gatsby build --prefix-paths && s3-deploy ..."
In my src/html.js, I have an asset that I want to include
<script src={`//${process.env.ASSET_HOST}/app.js`}></script>
When I log the DEPLOY_ENV from gatsby-config.js it is set to staging, however, when I log process.env in src/html.js, ASSET_HOST is set as the one in my .env.production file, so when I deploy to staging it uses assets from my production host.
I think DEPLOY_ENV (as NODE_ENV) is a reserved environment variable. That's why DEPLOY_ENV=staging is not working in your case.
The Gatsby docs on environment variables advices to use a secondary environment variable for additionnal environement support.
You can add a .env.staging file in your root folder, where you put your ASSET_HOST env var.
Then run gatsby with ACTIVE_ENV=staging gatsby develop