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1465372a0e
Previously, the correct behavior of Angular custom elements relied on the constructor being called (and thus the `injector` property being initialized). However, some polyfills (e.g. `document-register-element`) do not call the constructor of custom elements, which resulted in the `injector` property being undefined and the `NgElementStrategy` failing to be instantiated. This commit fixes it by being tolerant to the `injector` property being undefined and falling back to the injector passed to the `createCustomElement()` config. NOTE: We don't have proper tests exercising the situation where the constructor is not called. For now this is tested using a Google internal test suite (which is how this issue was caught). This commit also adds a rudimentary unit test to emulate this situation. PR Close #36114 PR Close #37226