diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js index 2450b86c921e83..6e215bcd04c680 100644 --- a/lib/internal/modules/cjs/loader.js +++ b/lib/internal/modules/cjs/loader.js @@ -124,6 +124,8 @@ const { pathToFileURL, fileURLToPath, isURL } = require('internal/url'); const { pendingDeprecate, emitExperimentalWarning, + isInsideNodeModules, + isUnderNodeModules, kEmptyObject, setOwnProperty, getLazy, @@ -1350,6 +1352,7 @@ let resolvedArgv; let hasPausedEntry = false; /** @type {import('vm').Script} */ +let emittedRequireModuleWarning = false; /** * Resolve and evaluate it synchronously as ESM if it's ESM. * @param {Module} mod CJS module instance @@ -1373,11 +1376,27 @@ function loadESMFromCJS(mod, filename) { // ESM won't be accessible via process.mainModule. setOwnProperty(process, 'mainModule', undefined); } else { - emitExperimentalWarning('Support for loading ES Module in require()'); + const parent = mod[kModuleParent]; + if (!emittedRequireModuleWarning) { + let shouldEmitWarning = false; + // Check if the require() comes from node_modules. + if (parent) { + shouldEmitWarning = !isUnderNodeModules(parent.filename) + } else if (mod[kIsCachedByESMLoader]) { + // It comes from the require() built for `import cjs` and doesn't have a parent recorded + // in the CJS module instance. Inspect the stack trace to see if the require() + // comes from node_modules. + shouldEmitWarning = !isInsideNodeModules(); + } + if (shouldEmitWarning) { + emitExperimentalWarning('Support for loading ES Module in require()'); + emittedRequireModuleWarning = true; + } + } const { wrap, namespace, - } = cascadedLoader.importSyncForRequire(mod, filename, source, isMain, mod[kModuleParent]); + } = cascadedLoader.importSyncForRequire(mod, filename, source, isMain, parent); // Tooling in the ecosystem have been using the __esModule property to recognize // transpiled ESM in consuming code. For example, a 'log' package written in ESM: // diff --git a/test/es-module/test-require-node-modules-warning.js b/test/es-module/test-require-node-modules-warning.js new file mode 100644 index 00000000000000..58017b3356b835 --- /dev/null +++ b/test/es-module/test-require-node-modules-warning.js @@ -0,0 +1,59 @@ +'use strict'; + +// This checks the experimental warning for require(esm) is disabled when the +// require() comes from node_modules. +require('../common'); +const { spawnSyncAndAssert } = require('../common/child_process'); +const fixtures = require('../common/fixtures'); + +const warningRE = /ExperimentalWarning: Support for loading ES Module in require\(\)/; + +// The fixtures are placed in a directory that includes "node_modules" in its name +// to check false negatives. + +// require() in non-node_modules -> esm in node_modules should warn. +spawnSyncAndAssert( + process.execPath, + [fixtures.path('es-modules', 'test_node_modules', 'require-esm.js')], + { + trim: true, + stderr: warningRE, + stdout: 'world', + } +); + +// require() in non-node_modules -> require() in node_modules -> esm in node_modules +// should not warn. +spawnSyncAndAssert( + process.execPath, + [fixtures.path('es-modules', 'test_node_modules', 'require-require-esm.js')], + { + trim: true, + stderr: '', + stdout: 'world', + } +); + +// import in non-node_modules -> require() in node_modules -> esm in node_modules +// should not warn. +spawnSyncAndAssert( + process.execPath, + [fixtures.path('es-modules', 'test_node_modules', 'import-require-esm.mjs')], + { + trim: true, + stderr: '', + stdout: 'world', + } +); + +// import in non-node_modules -> import in node_modules -> +// require() in node_modules -> esm in node_modules should not warn. +spawnSyncAndAssert( + process.execPath, + [fixtures.path('es-modules', 'test_node_modules', 'import-import-require-esm.mjs')], + { + trim: true, + stderr: '', + stdout: 'world', + } +); diff --git a/test/fixtures/es-modules/test_node_modules/import-import-require-esm.mjs b/test/fixtures/es-modules/test_node_modules/import-import-require-esm.mjs new file mode 100644 index 00000000000000..d470088c38caee --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/import-import-require-esm.mjs @@ -0,0 +1,2 @@ +import mod from 'import-require-esm'; +console.log(mod.hello); diff --git a/test/fixtures/es-modules/test_node_modules/import-require-esm.mjs b/test/fixtures/es-modules/test_node_modules/import-require-esm.mjs new file mode 100644 index 00000000000000..2ad346de9e841c --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/import-require-esm.mjs @@ -0,0 +1,2 @@ +import mod from 'require-esm'; +console.log(mod.hello); diff --git a/test/fixtures/es-modules/test_node_modules/node_modules/esm/index.js b/test/fixtures/es-modules/test_node_modules/node_modules/esm/index.js new file mode 100644 index 00000000000000..35f468bf4856d8 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/node_modules/esm/index.js @@ -0,0 +1 @@ +export const hello = 'world'; diff --git a/test/fixtures/es-modules/test_node_modules/node_modules/esm/package.json b/test/fixtures/es-modules/test_node_modules/node_modules/esm/package.json new file mode 100644 index 00000000000000..07aec65d5a4f31 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/node_modules/esm/package.json @@ -0,0 +1,4 @@ +{ + "type": "module", + "main": "index.js" +} diff --git a/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/index.js b/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/index.js new file mode 100644 index 00000000000000..918bb5d5597e34 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/index.js @@ -0,0 +1,2 @@ +import mod from 'require-esm'; +export default mod; diff --git a/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/package.json b/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/package.json new file mode 100644 index 00000000000000..07aec65d5a4f31 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/node_modules/import-require-esm/package.json @@ -0,0 +1,4 @@ +{ + "type": "module", + "main": "index.js" +} diff --git a/test/fixtures/es-modules/test_node_modules/node_modules/require-esm/index.js b/test/fixtures/es-modules/test_node_modules/node_modules/require-esm/index.js new file mode 100644 index 00000000000000..ca6f0c264ad1fc --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/node_modules/require-esm/index.js @@ -0,0 +1,2 @@ +module.exports = require('esm'); + diff --git a/test/fixtures/es-modules/test_node_modules/require-esm.js b/test/fixtures/es-modules/test_node_modules/require-esm.js new file mode 100644 index 00000000000000..60ad3f7fff60c6 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/require-esm.js @@ -0,0 +1,2 @@ +const { hello } = require('esm'); +console.log(hello); diff --git a/test/fixtures/es-modules/test_node_modules/require-require-esm.js b/test/fixtures/es-modules/test_node_modules/require-require-esm.js new file mode 100644 index 00000000000000..9fe255dce258a6 --- /dev/null +++ b/test/fixtures/es-modules/test_node_modules/require-require-esm.js @@ -0,0 +1,2 @@ +const { hello } = require('require-esm'); +console.log(hello);