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123

What is JavaScript shorthand property?

rated 0 times [ 130] [ 7] / answers: 1 / hits: 34314 / 8 Years ago, mon, august 15, 2016, 12:00:00

var obj = { prop = [1,2,3] };

The code above contains a typo, there should be a colon instead of =. But what surprised me was the VM error message:

var obj = { prop = [1,2,3] };

            ^^^^^^^^^^^^^^

SyntaxError: Invalid shorthand property initializer

I searched for JavaScript shorthand properties but this term is still not clear to me. What does Shorthand property means in context of this error message?

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sylviakaitlinj

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answered 8 Years ago jazmyne · Accepted Answer

With ES6, you can use shorthand property names which allow you to write something like this.

var s = 'abc';

var n = 1;

var o = { s, n }; // This is equivalent to { s: s, n: n }

In your case, prop = [1,2,3] was parsed as one shorthand property (s and n in the example above), but it was not a proper property name.