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diff --git a/js/global-eval.ts b/js/global-eval.ts
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+++ b/js/global-eval.ts
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+// If you use the eval function indirectly, by invoking it via a reference
+// other than eval, as of ECMAScript 5 it works in the global scope rather than
+// the local scope. This means, for instance, that function declarations create
+// global functions, and that the code being evaluated doesn't have access to
+// local variables within the scope where it's being called.
+export const globalEval = eval;