How to set run time env variable in webpack?

@lottie 

To set a runtime environment variable in webpack, you can use the DefinePlugin provided by webpack. Here's an example of how to set a runtime environment variable in webpack configuration:

1. Install webpack and webpack-cli if you haven't already:

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npm install webpack webpack-cli --save-dev

1. Update your webpack configuration file (usually named webpack.config.js) to include the DefinePlugin:

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const webpack = require('webpack');

module.exports = {
  // Other webpack configuration options
  plugins: [
    new webpack.DefinePlugin({
      'process.env.MY_ENV_VARIABLE': JSON.stringify('my environment variable value')
    })
  ]
};

1. In your code, you can now access the environment variable using process.env.MY_ENV_VARIABLE:

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console.log(process.env.MY_ENV_VARIABLE);

1. To build your project with the runtime environment variable set, run the webpack build command:

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npx webpack

Now, your webpack build will replace instances of process.env.MY_ENV_VARIABLE with the value you specified in the DefinePlugin, allowing you to set runtime environment variables in your webpack build.