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node_modules/lottie-web/rollup.config.js

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+import { nodeResolve } from '@rollup/plugin-node-resolve';
+import { terser } from 'rollup-plugin-terser';
+import babel from '@rollup/plugin-babel';
+import {version} from './package.json'
+
+const injectVersion = (options = {}) => {
+  return {
+    name: 'inject-version',
+    renderChunk: (code) => {
+      return code.replace('[[BM_VERSION]]', version)
+    },
+  }
+}
+
+const addNavigatorValidation = (options = {}) => {
+  return {
+    name: 'inject-version',
+    renderChunk: (code) => {
+      return '(typeof navigator !== "undefined") && '  + code
+    },
+  }
+}
+
+const noTreeShakingForStandalonePlugin = () => {
+  return {
+    name: 'no-treeshaking-for-standalone',
+    transform(code) {
+        // This is very fast but can produce lots of false positives.
+        // Use a good regular expression or parse an AST and analyze scoping to improve as needed.
+        if (code.indexOf('__[STANDALONE]__') >= 0) return {moduleSideEffects: 'no-treeshake'};
+    }
+  }
+}
+
+const destinationBuildFolder = 'build/player/';
+
+const builds = [
+  {
+    input: 'player/js/modules/full.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/full.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/svg_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/svg_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/svg.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_svg.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/svg.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_svg.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/canvas.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_canvas.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/canvas_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light_canvas.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/canvas_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light_canvas.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/canvas.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_canvas.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/html_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light_html.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/html_light.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_light_html.js',
+    esm: false,
+    skipTerser: true,
+  },
+  {
+    input: 'player/js/modules/html.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_html.min.js',
+    esm: true,
+  },
+  {
+    input: 'player/js/modules/html.js',
+    dest: `${destinationBuildFolder}`,
+    file: 'lottie_html.js',
+    esm: false,
+    skipTerser: true,
+  },
+];
+
+const plugins = [
+  nodeResolve(),
+  babel({
+    babelHelpers: 'runtime',
+    skipPreflightCheck: true,
+  }),
+  // noTreeShakingForStandalonePlugin(),
+  injectVersion(),
+  addNavigatorValidation(),
+]
+const pluginsWithTerser = [
+  ...plugins,
+  terser(),
+]
+
+const UMDModule = {
+  output: {
+    format: 'umd',
+    name: 'lottie', // this is the name of the global object
+    esModule: false,
+    exports: 'default',
+    sourcemap: false,
+    compact: false,
+  },
+  treeshake: false,
+};
+
+const ESMModule = {
+  plugins: [nodeResolve()],
+  treeshake: false,
+  output: [
+    {
+      format: 'esm',
+      exports: 'named',
+    },
+    {
+      format: 'cjs',
+      exports: 'named',
+    },
+  ],
+};
+
+const exports = builds.reduce((acc, build) => {
+  const builds = [];
+  builds.push({
+    ...UMDModule,
+    plugins: !build.skipTerser ? pluginsWithTerser : plugins,
+    input: build.input,
+    output: {
+      ...UMDModule.output,
+      file: `${build.dest}${build.file}`,
+    }
+  });
+  if (build.esm) {
+    builds.push({
+      ...ESMModule,
+      input: build.input,
+      output: [
+        {
+          ...ESMModule.output[0],
+          file: 'dist/esm/' + build.file,
+          file: `${destinationBuildFolder}esm/${build.file}`,
+        },
+        {
+          ...ESMModule.output[1],
+          file: `${destinationBuildFolder}cjs/${build.file}`,
+        }
+      ]
+    });
+  }
+  
+  acc = acc.concat(builds);
+  return acc;
+}, []);
+export default exports;