The webpack.ProvidePlugin does not tree shake code as documented

[zerustech]

Steps to reproduce this issue

1. Initialize the project structure:

$ cd <base>
$ mkdir test
$ cd test
$ yarn init
$ yarn add --dev webpack webpack-cli
$ mkdir src

2. Create src/index.js:

function component() {
    const element = document.createElement('pre');
    element.innerHTML = ['Hello', 'webpack', '5 cube is equal to ' + cube(5)].join('\n\n');
    return element;
}
document.body.appendChild(component());

3. Create src/math.js:

export function square(x) {
    return x * x;
};

export function cube(x) {
    return x * x * x;
};

4. Create webpack.config.js:

const path = require('path');
const webpack = require('webpack');

module.exports = {
    entry: './src/index.js',
    output: {
        filename: '[name].bundle.js',
        path: path.resolve(__dirname, 'dist'),
    },
    plugins: [
        new webpack.ProvidePlugin({
            cube: ['./math.js', 'cube'],
        }),
    ],
    mode: 'production',
    optimization: {
        runtimeChunk: true,
    },
};

5. Build the bundle:

$ yarn webpack

6. Expected Result:
   ONLY the cube() function is included in dist/main.bundle.js

7. Actual Result:
   BOTH the cube() and the square() functions are included.

Environment

• webpack - 5.14.10
• node - 15.5.0
• OS - macOS Big Sur

[webpack-bot]

This issue had no activity for at least three months.

It's subject to automatic issue closing if there is no activity in the next 15 days.

[alexander-akait]

bump

[webpack-bot]

Issue was closed because of inactivity.

If you think this is still a valid issue, please file a new issue with additional information.

[vankop]

Closing because of inactivity. Feel free to report new issue with reproducible repo.

[alexander-akait]

Still valid