javascript.builtins.Array.isArray - isArray present since Node 6

[paceaux]

What information was incorrect, unhelpful, or incomplete?

Node.js Version is incorrect for Array.isArray

What did you expect to see?

Expected to see version 6.4, not Node v 10.

Did you test this? If so, how?

1. Used iNVM to install node 6.4
2. Ran the below in the node terminal:

var arr = [];
Array.isArray(arr); 

It returned true;

This compatibility chart shows support in 6.4 https://node.green/#ES2015-built-ins-Proxy

MDN page report details

• Query: javascript.builtins.Array.isArray
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray
• Report started: 2021-01-28T22:59:23.711Z

[ddbeck]

Thanks for reporting this, @paceaux. I did some checking and I'm satisfied by the data for Array.isArray. A few points:

• I didn't see v10.0.0 mentioned in the MDN page included in this report. I'm guessing this is an (understandable) misreading of v0.10.0 (note the leading zero). But if I'm mistaken and you saw an issue with a different page, then feel free to post a follow-up comment linking the problem page.
• I double-checked that Array.isArray([]) in Node.js v0.10.0 and it works as expected. This is the first version of Node.js that BCD records. See the schema documentation on initial versions and What should be the minimum listed version of nodejs? #6861, if you'd like to know why we don't record versions before Node.js v0.10.0.
• The node.green table entry you linked to is about the behavior of Proxy with Array.isArray. As far as I can tell, we do not record data for that specific interaction, but we do correctly report Proxy as introduced in Node.js v6.0.0 (see Proxy.json for detail). Conversely, node.green doesn't appear to track the availability of the Array.isArray static method, so I can't directly compare our results to theirs for the method itself.

All that said, if I've missed anything, please let us know. In the mean time, I'm going to close this issue. Thanks again!