Differences in Typescript array literal syntax

Question

Typescript allows one to define an Array with either syntax:

var myStrArry1: string[] = [];

or

var myStrArry1: Array<string> = [];

The compiled output appears to be the same. Does the compiler treat them identically, or are there some quirks to be aware of?

Possible duplicate of Typed arrays in TypeScript - what is the difference between Array<Foo> and Foo[]? — user247702
– user247702, Commented Jan 19, 2016 at 21:21

basarat · Accepted Answer · 2016-01-19 21:20:43Z

4

Does the compiler treat them identically, or are there some quirks to be aware of?

They are identical. I prefer syntax 1

answered Jan 19, 2016 at 21:20

basarat

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Gnarlywhale · Accepted Answer · 2016-01-19 21:22:53Z

2

From the typescript documentation, they are treated identically, one is simply a shorthand notation for the other. The compiler doesn't care which one you use.

answered Jan 19, 2016 at 21:22

Gnarlywhale

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MartyIX · Accepted Answer · 2016-01-19 21:24:57Z

1

This is the paragraph from TypeScript specification: https://github.com/Microsoft/TypeScript/blob/master/doc/spec.md#3.8.4 that specifies that both syntaxes are equivalent:

Alternatively, array types can be written using the Array<T> notation. For example, the types above are equivalent to

Array<string | number> Array<() => string>

answered Jan 19, 2016 at 21:24

MartyIX

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