node.js process.env.NODE_ENV 无法判断问题?

Answer 1

Thanks for the invitation production Do not leave spaces

"start": "set NODE_ENV=production&& npm run build && node babel/server",

Just look at the output

console.log(`+${env}+`, env === "production");

Answer 2

declare -x NODE_ENV=production && node temp.js

Passed the test myself

If it does not pass, use typeof env to print out the type and have a look. It may be object

Answer 3

Change the set in the command to export

export NODE_ENV=production

You used the set command to bring spaces into environment variables