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-rw-r--r--lib/internal/process/esm_loader.js6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/internal/process/esm_loader.js b/lib/internal/process/esm_loader.js
index 19099d9cbd..404be77338 100644
--- a/lib/internal/process/esm_loader.js
+++ b/lib/internal/process/esm_loader.js
@@ -24,6 +24,12 @@ exports.initializeImportMetaObject = function(wrap, meta) {
exports.importModuleDynamicallyCallback = async function(wrap, specifier) {
assert(calledInitialize === true || !userLoader);
+ if (!calledInitialize) {
+ process.emitWarning(
+ 'The ESM module loader is experimental.',
+ 'ExperimentalWarning', undefined);
+ calledInitialize = true;
+ }
const { callbackMap } = internalBinding('module_wrap');
if (callbackMap.has(wrap)) {
const { importModuleDynamically } = callbackMap.get(wrap);