Why PhpStorm is highlighting this as error in my JavaScript declaration [duplicate]

Question

I've declared this JS function and PhpStorm is highlighting it as an error, saying that ,or) expected.

function getData(params, toCache=true) { ...

Why is PhpStorm highlighting toCache=true as an error? Is this not the correct way to declare default params in JavaScript? My code is working, so is this just a bug in PhpStorm.

Settings > Languages & Frameworks > JavaScript > select "ECMAScript6" from dropdown. — Mjh
– Mjh, Commented Jan 12, 2017 at 8:44

pwolaq · Accepted Answer · 2017-01-12 08:43:32Z

3

This is probably because default parameters are part of ES6 specification and your project environment is set to ES5.

answered Jan 12, 2017 at 8:43

pwolaq

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1 Comment

Holly Over a year ago

that's it exactly, found an answer for it here too stackoverflow.com/a/37571826/1814446 - if I could I would down vote myself

Rafal Mazgaj · Accepted Answer · 2017-01-12 08:53:37Z

1

Probably, You set PhpStorm to ES5 where default parameters work differently. Example of default parameters for ES5:

function getData(params, toCache){
   if (typeof(toCache)==='undefined') toCache = true;
}

Your code is written on the ES6 and running, PhpStorm highlights.

answered Jan 12, 2017 at 8:53

Rafal Mazgaj

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