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-rw-r--r--dom/script/ModuleLoadRequest.cpp8
1 files changed, 8 insertions, 0 deletions
diff --git a/dom/script/ModuleLoadRequest.cpp b/dom/script/ModuleLoadRequest.cpp
index e72edca2e..98106df1b 100644
--- a/dom/script/ModuleLoadRequest.cpp
+++ b/dom/script/ModuleLoadRequest.cpp
@@ -52,6 +52,14 @@ void ModuleLoadRequest::Cancel()
void
ModuleLoadRequest::SetReady()
{
+ // Mark a module as ready to execute. This means that this module and all it
+ // dependencies have had their source loaded, parsed as a module and the
+ // modules instantiated.
+ //
+ // The mReady promise is used to ensure that when all dependencies of a module
+ // have become ready, DependenciesLoaded is called on that module
+ // request. This is set up in StartFetchingModuleDependencies.
+
#ifdef DEBUG
for (size_t i = 0; i < mImports.Length(); i++) {
MOZ_ASSERT(mImports[i]->IsReadyToRun());