How to use @rollup/plugin-json - 9 common examples

// during a single build.
  hasTSChecked = true

  const entryFile =
    format === 'esm-bundler-runtime' ? `src/runtime.ts` : `src/index.ts`

  return {
    input: resolve(entryFile),
    // Global and Browser ESM builds inlines everything so that they can be
    // used alone.
    external:
      isGlobalBuild || isRawESMBuild
        ? []
        : knownExternals.concat(Object.keys(pkg.dependencies || [])),
    plugins: [
      json({
        namedExports: false
      }),
      tsPlugin,
      createReplacePlugin(
        isProductionBuild,
        isBundlerESMBuild,
        (isGlobalBuild || isRawESMBuild || isBundlerESMBuild) &&
          !packageOptions.enableNonBrowserBranches,
        isRuntimeCompileBuild
      ),
      ...plugins
    ],
    output,
    onwarn: (msg, warn) => {
      if (!/Circular/.test(msg)) {
        warn(msg)

// during a single build.
  hasTSChecked = true;

  return {
    ...config,
    input: resolve(`src/index.ts`),
    // Global and Browser ESM builds inlines everything so that they can be
    // used alone.
    external:
      isGlobalBuild || isRawESMBuild
        ? config.external || []
        : knownExternals.concat(Object.keys(pkg.dependencies || [])),
    plugins: [
      ...(config.plugins || []),

      json({
        namedExports: false
      }),
      tsPlugin,
      createReplacePlugin(
        isProductionBuild,
        isBundlerESMBuild,
        (isGlobalBuild || isRawESMBuild) &&
          !packageOptions.enableNonBrowserBranches,
        isRuntimeCompileBuild
      ),
      ...plugins
    ],
    output,
    onwarn: (msg, warn) => {
      if (!/Circular/.test(msg)) {
        warn(msg);

output: { file: "dist/index.js", format: "cjs", sourcemap: true },
    preserveSymlinks: false,
    plugins: [
      sourcemaps(),
      replace({
        delimiters: ["", ""],
        values: {
          // replace dynamic checks with if (true) since this is for node only.
          // Allows rollup's dead code elimination to be more aggressive.
          "if (isNode)": "if (true)",
          "if (!isNode)": "if (false)"
        }
      }),
      nodeResolve({ preferBuiltins: true }),
      cjs(),
      json()
    ]
  };

  if (test) {
    // entry point is every test file
    baseConfig.input = "dist-esm/test/*.spec.js";
    baseConfig.plugins.unshift(multiEntry({ exports: false }));

    // different output file
    baseConfig.output.file = "test-dist/index.js";

    // mark assert as external
    baseConfig.external.push(
      "assert",
      "fs",
      "path",

// path for originally local dependencies.
      return !(dependency === input || isRelative(dependency) || isAbsolute(dependency))
    },
    acornInjectPlugins: [ acornJsx() ],
    plugins: [
      options.quiet ? null : progressPlugin({ watch: options.watch }),
      options.exec ? advancedRun() : null,

      typescriptResolvePlugin(),
      rebasePlugin(),
      cjsPlugin({
        include: "node_modules/**",
        extensions
      }),
      replacePlugin(variables),
      jsonPlugin(),
      babelPlugin({
        // Rollup Setting: Prefer usage of a common library of helpers
        runtimeHelpers: format !== "umd",
        // We use envName to pass information about the build target and format to Babel
        envName: env ? `${env}-${target}-${format}` : `${target}-${format}`,
        // The Babel-Plugin is not using a pre-defined include, but builds up
        // its include list from the default extensions of Babel-Core.
        // Default Extensions: [".js", ".jsx", ".es6", ".es", ".mjs"]
        // We add TypeScript extensions here as well to be able to post-process
        // any TypeScript sources with Babel. This allows us for using presets
        // like "react" and plugins like "fast-async" with TypeScript as well.
        extensions,
        // Do not transpile external code
        // https://github.com/rollup/rollup-plugin-babel/issues/48#issuecomment-211025960
        exclude: [ "node_modules/**", "**/*.json" ]
      }),

external: depNames.concat(externalNodeBuiltins),
    output: { file: "dist/index.js", format: "cjs", sourcemap: true },
    preserveSymlinks: false,
    plugins: [
      sourcemaps(),
      replace({
        delimiters: ["", ""],
        values: {
          // replace dynamic checks with if (true) since this is for node only.
          // Allows rollup's dead code elimination to be more aggressive.
          "if (isNode)": "if (true)"
        }
      }),
      nodeResolve({ preferBuiltins: true }),
      cjs(),
      json()
    ]
  };

  baseConfig.external.push("crypto", "path");

  if (test) {
    // entry point is every test file
    baseConfig.input = "dist-esm/test/**/*.spec.js";
    baseConfig.plugins.unshift(multiEntry({ exports: false }));

    // different output file
    baseConfig.output.file = "test-dist/index.js";

    // mark assert as external
    baseConfig.external.push("assert", "fs", "os", "tty", "child_process");

namedExports: {
          chai: ["should"],
          assert: ["equal", "deepEqual", "notEqual"]
        }
      }),

      // rhea and rhea-promise use the Buffer global which requires
      // injection to shim properly
      inject({
        modules: {
          Buffer: ["buffer", "Buffer"],
          process: "process"
        }
      }),

      json()
    ]
  };

  if (test) {
    baseConfig.input = "dist-esm/test/**/*.spec.js";
    baseConfig.plugins.unshift(multiEntry({ exports: false }));
    baseConfig.output.file = "test-browser/index.js";

    // Disable tree-shaking of test code.  In rollup-plugin-node-resolve@5.0.0, rollup started respecting
    // the "sideEffects" field in package.json.  Since our package.json sets "sideEffects=false", this also
    // applies to test code, which causes all tests to be removed by tree-shaking.
    baseConfig.treeshake = false;
  } else if (production) {
    baseConfig.plugins.push(terser());
  }

external: depNames.concat(externalNodeBuiltins),
    output: { file: "dist/index.js", format: "cjs", sourcemap: true },
    preserveSymlinks: false,
    plugins: [
      sourcemaps(),
      replace({
        delimiters: ["", ""],
        values: {
          // replace dynamic checks with if (true) since this is for node only.
          // Allows rollup's dead code elimination to be more aggressive.
          "if (isNode)": "if (true)"
        }
      }),
      nodeResolve({ preferBuiltins: true }),
      cjs(),
      json()
    ]
  };

  if (test) {
    // entry point is every test file
    baseConfig.input = "dist-esm/test/**/*.spec.js";
    baseConfig.plugins.unshift(multiEntry({ exports: false }));

    // different output file
    baseConfig.output.file = "test-dist/index.js";

    // mark assert as external
    baseConfig.external.push();

    // Disable tree-shaking of test code.  In rollup-plugin-node-resolve@5.0.0, rollup started respecting
    // the "sideEffects" field in package.json.  Since our package.json sets "sideEffects=false", this also

}),
      vue({ compileTemplate: true, css: false }),
      alias({
        entries: [
          {
            find: "@",
            replacement: path.resolve("src")
          }
        ]
      }),
      resolve({
        browser: true,
        preferBuiltins: false,
        extensions: [".js", ".json", ".vue"]
      }),
      json(),
      babel({
        exclude: "node_modules/**",
        sourceMap: true,
        runtimeHelpers: true,
        extensions: [".js", ".jsx", ".vue"]
      }),
      commonjs(),
      filesize()
    ].concat(opts.plugins || []),
    output: {
      exports: "named",
      file: opts.dest,
      format: opts.format,
      name: opts.moduleName || projectName,
      globals: opts.globals
    }

{
          src: [`${options.rootDir}/native/*`],
          dest: options.output,
        },
      ],
      copyOnce: true,
    }),
    alias(options),
    url({
      limit: 0,
      fileName: '[dirname][name][extname]',
      publicPath: '/',
      sourceDir: path.resolve(options.cwd, options.rootDir),
      include: ['**/*.svg', '**/*.png', '**/*.jpg', '**/*.jpeg', '**/*.gif'],
    }),
    json(),
    resolve({
      dedupe: [
        'react',
        'object-assign',
        'prop-types',
        'scheduler',
        'react-reconciler',
      ],
      extensions,
      customResolveOptions: {
        moduleDirectory: 'node_modules',
      },
    }),
    commonjs({
      include: /node_modules/,
      namedExports,