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74

array.prototype.flat is undefined in nodejs

rated 0 times [ 80] [ 6] / answers: 1 / hits: 17023 / 6 Years ago, tue, october 30, 2018, 12:00:00

Given is the following js command:

[].flat;

Executing it in a browser (chrome/firefox): returns function

Executing it with nodejs v10.13.0: returns undefined

Now I am wondering what other methods are not in the node RTE and where the documentation of global Objects like Array is.

Seems to be the same with Array.prototype.flatMap.

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rafael

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3 Years ago

answered 6 Years ago taylert · Accepted Answer

You'll need node 11 or higher for Array.prototype.flat. MDN is a great resource both for learning about Javascript and as a reference. You will find information about usage, browser compatibility, and even polyfills there.

As for Node.js support of ES6+, the best resource is node.green with a very detailed and up to date list of supported features by node version.