Javascript hasOwnProperty for chain (nested) of properites?

Asked Jun 13 '18 at 10:20

Active Jun 13 '18 at 10:20

Viewed 35 times

I expect the following chain of properties (nested objects) error.response.data.errorCode on object error. How can I check that errorCode really exists? Of course - I can write the following code:

if (error.hasOwnPropert('response') {
    if (error.repsonse.hasOwnProperty('data') {
        ...
    }
}

Of course, I can also write function, that parses property name (error.response.data.errorCode) and that recursively check the existence of expected property but maybe there is already built-in and optimized function for this?

asked Jun 13 '18 at 10:20

TomR

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That will throw an error. Spelling matters in programming – CertainPerformance Jun 13 '18 at 10:21
1

you could check with `var obj = error; if (['response', 'data', 'errorCode'].every(k => obj.hasOwnProperty(k) && (obj = obj[k], true))) {` – Nina Scholz Jun 13 '18 at 10:33
No, there's no builtin for this, you have to write your own (or use one of the many libs providing one) – Bergi Jun 13 '18 at 12:27

Javascript hasOwnProperty for chain (nested) of properites?

0 Answers0