express-env
Advanced tools
Safely expose your environment variables to dynamically fetch them in the frontend.
Safely expose your environment variables to dynamically fetch them in the frontend.
import expressEnv from 'express-env'
app.use('/env', expressEnv())
<!DOCTYPE html>
<html>
<head>
<script src="./env"></script>
</head>
<body>
<script>
console.log(window.ENV)
</script>
</body>
</html>
process.env = {
'WILLEM': 'DAFOE',
'MICHAEL': 'DOUGLAS',
}
app.use('/env', expressEnv({ namespace: 'window.LEAKY_ENVIRONMENT' }))
// GET /env: window.LEAKY_ENVIRONMENT = {"WILLEM":"DAFOE","MICHAEL":"DOUGLAS"}
As an array of strings:
process.env = {
'WILLEM': 'DAFOE',
'MICHAEL': 'DOUGLAS',
}
app.use('/env', expressEnv({ whitelist: ['MICHAEL'] }))
// GET /env: window.ENV = {"MICHAEL":"DOUGLAS"}
As a function:
process.env = {
'WILLEM': 'DAFOE',
'MICHAEL': 'DOUGLAS',
}
app.use('/env', expressEnv({ blacklist: (value: string, key: string) => key.includes('CH') }))
// GET /env: window.ENV = {"WILLEM":"DAFOE"}
FAQs
Safely expose your environment variables to dynamically fetch them in the frontend.
The npm package express-env receives a total of 0 weekly downloads. As such, express-env popularity was classified as not popular.
We found that express-env demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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