将变量传递到 package.json

Question

I'm working on React app. I need to pass a variable into package.json from.env file:

{"proxy": "ENV_VAR"}

Is it possible to do that?

Also, we build app using docker. Could we rewrite that key using docker anyhow?

Answer 1

What is the end goal? Is it to define a process direction on build? If it is then you dont need to pass it to package.json but to read it in the build script. For example start the build task like this ( its doesn't in package.json or not )

PROXY=SOME_PROXY npm run-script build

If its something like create-react-app did you check: this https://create-react-app.dev/docs/proxying-api-requests-in-development/

So you can read the env

const proxy = require('http-proxy-middleware');
module.exports = function(app) {
  app.use(
    '/api',
    proxy({
      target: process.env.ENV_VAR,
      changeOrigin: true,
    })
  );
};