Pete Bacon Darwin c4ce24647b fix(compiler-cli): ensure that ngI18nClosureMode is guarded in generated code (#34211)
If the `ngI18nClosureMode` global check actually makes it
through to the runtime, then checks for its existence should
be guarded to prevent `Reference undefined` errors in strict
mode.

(Normally, it is stripped out by dead code elimination during
build optimization.)

This comment ensures that generated template code guards
this global check.

PR Close #34211
2019-12-03 16:18:12 -08:00
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