If you request the same module entry point to evaluate multiple times, JSC raises Type error. Now, the current loader API spec becomes abandoned. We can just modify our loader to fit to the whatwg's HTML's ES6 modules.
Created attachment 295707 [details] Patch
Comment on attachment 295707 [details] Patch r=me
Committed r209172: <http://trac.webkit.org/changeset/209172>