DefinePlugin with not replacing function

[khats]

I try to replace function declaration with DefinePlugin and it worked with 4th version of webpack, but 5th (5.26.2) not;
I have repository with demo:
https://github.com/khats/storybook-demo
and issue reported to storybook project storybookjs/storybook#14257

In webpack config there is:

plugins: [
      new webpack.DefinePlugin({
      "process.env.NODE_ENV": JSON.stringify("development"),
      "window.FAKE_GLOBAL_FUNCTION": "(function() { return console.log('log from define plugin function'); })",
    }),
],

In code this declaration not replaced with DefinePlugin:

window.FAKE_GLOBAL_FUNCTION();

but this one:

const tempVariable = window.FAKE_GLOBAL_FUNCTION; 
tempVariable();

compiled to:

var tempVariable = (function() { return console.log('log from define plugin function'); });
tempVariable();

I have added my note to storybook ticket too: storybookjs/storybook#14257 (comment)

[alexander-akait]

It is described on docs, only identifiers replaced https://webpack.js.org/plugins/define-plugin/#usage, not functions

[khats]

@alexander-akait why this one:
window.FAKE_GLOBAL_FUNCTION();
not replaced with this one?
(function() { return console.log('log from define plugin function'); })();

[tophf]

@alexander-akait, we can do it in v5 anyway via (0, process.env.FOO)(), so why not enable proper substitution in evaluateCallExpression parser hook (or a similar one) by default?

[khats]

define variable as (without "window." prefix in variable) works too:

plugins: [
      new webpack.DefinePlugin({
      "process.env.NODE_ENV": JSON.stringify("development"),
      "FAKE_GLOBAL_FUNCTION": "(function() { return console.log('log from define plugin function'); })",
    }),
],