How to call a function in build time through webpack?

@daisha 

You can call a function in build time through webpack by using webpack plugins. One popular plugin for this purpose is the DefinePlugin.

Here is an example of how you can use the DefinePlugin to call a function in build time:

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const webpack = require('webpack');

module.exports = {
  // Your webpack configuration
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production'),
      MY_FUNCTION: JSON.stringify(yourFunction())
    })
  ]
};

In the above example, we are defining a variable MY_FUNCTION and assigning the result of yourFunction() to it. This will be evaluated during the build time and the value will be replaced in your code where MY_FUNCTION is used.

Make sure to replace yourFunction() with the actual function that you want to call in build time.

When you run webpack, it will evaluate the function yourFunction() and substitute the result of the function call wherever MY_FUNCTION is used in your code.