webpack.config.js

const path = require('path');
const webpack = require('webpack');
const TerserPlugin = require('terser-webpack-plugin');
const pkg = require('./package.json');

const banner = `/*!
 * ${pkg.title} ${pkg.version} <${pkg.homepage}>
 * Copyright (c) ${(new Date()).getFullYear()} ${pkg.author.name} <${pkg.author.url}>
 * Released under ${pkg.license} License
 */`;

const commonConfig = {
    mode: 'production',
    entry: './src/index.ts',
    output: {
        path: path.resolve(__dirname, 'dist'),
        library: 'html2canvas',
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    resolve: {
        extensions: ['.ts', '.js', '.json'],
    },
    module: {
        rules: [
            {
                test: /\.ts$/,
                use: 'ts-loader',
                exclude: /node_modules/,
            },
            {
                test: /\.json$/,
                use: 'json-loader',
                type: 'javascript/auto'
            },
        ],
    },
    plugins: [
        new webpack.BannerPlugin(banner),
        new webpack.SourceMapDevToolPlugin({
            filename: '[name].js.map',
        }),
    ],
};

const nonMinifiedConfig = {
    ...commonConfig,
    output: {
        ...commonConfig.output,
        filename: 'html2canvas.js',
    }
};

const esmConfig = {
    ...commonConfig,
    output: {
        ...commonConfig.output,
        filename: 'html2canvas.esm.js',
    },
    // ... ES module-specific configurations
};

const minifiedConfig = {
    ...commonConfig,
    output: {
        ...commonConfig.output,
        filename: 'html2canvas.min.js',
    },
    optimization: {
        minimize: true,
        minimizer: [new TerserPlugin({
            terserOptions: {
                format: {
                    comments: /^!/, // Preserve comments that start with `!`
                },
            },
            extractComments: false,
        })],
    },
};

module.exports = [esmConfig, nonMinifiedConfig, minifiedConfig];