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Learning TypeScript 2.x - Second Edition
book

Learning TypeScript 2.x - Second Edition

by Remo H. Jansen
April 2018
Beginner content levelBeginner
536 pages
13h 21m
English
Packt Publishing
Content preview from Learning TypeScript 2.x - Second Edition

Private members powered by closures

In the previous section, we learned that closures can access variables that persist beyond the lexical scope from which they were created. These variables are not part of the function prototype or body, but they are part of the function context.

Because there is no way we can directly invoke the function context, the context variables and methods can be used to emulate private members at runtime. The main advantage of using closures to emulate private members (instead of the TypeScript private access modifier) is that closures will prevent access to private members at runtime.

TypeScript avoids emulating private properties at runtime because the compiler will throw an error at compilation time if we attempt ...

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Publisher Resources

ISBN: 9781788391474Supplemental Content