docs(aio): document the special treatment of undefined

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Trotyl Yu 2017-09-24 10:15:46 +08:00 committed by Alex Rickabaugh
parent d4d9009696
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@ -142,7 +142,7 @@ The `hero` in `{{hero.name}}`
refers to the template input variable, not the component's property.
Template expressions cannot refer to anything in
the global namespace. They can't refer to `window` or `document`. They
the global namespace (except `undefined`). They can't refer to `window` or `document`. They
can't call `console.log` or `Math.max`. They are restricted to referencing
members of the expression context.