rollup-plugin-import-meta-env v0.0.2

Env Variables

The plugin exposes env variables on the special import.meta.env object.

Config

env({
    PROD: true,
    DEV:false
})

Before

console.log(import.meta.env.DEV);

After

console.log(false);

.env Files

The plugin uses dotenv to load additional environment variables from the following files in your environment directory:

.env                # loaded in all cases
.env.local          # loaded in all cases, ignored by git
.env.[mode]         # only loaded in specified mode
.env.[mode].local   # only loaded in specified mode, ignored by git

Modes config

env({
    PROD: true,
    DEV:false
},{
    mode:"production"
})

Remove unuse variables by tree-shaking.

To prevent accidentally leaking env variables to the client, it is therefore recommend to always reference them using the full static string. For example, dynamic key access will not recommend.

DB_PASSWORD=foobar
VITE_SOME_KEY=123

Before

// GOOD
console.log(import.meta.env.VITE_SOME_KEY);

After

// GOOD
console.log("123");

Before

// BAD
var env=import.meta.env;
console.log(env.VITE_SOME_KEY);

After

// BAD
var env={
	DB_PASSWORD: "foobar",
	VITE_SOME_KEY: "123"
};
console.log(env.VITE_SOME_KEY);

Filter exposed variables

To prevent accidentally leaking env variables to the client, config function to filter exposed variables. Only variables prefixed with VITE_ are exposed by e.g. the following config.

env({
    PROD: true,
    DEV:false
},{
    mode:"production",
    filter(key){
        if(key.startsWith("VITE_")){
            return true;
        }
        return false;
    }
})