I'm a new user of Promises in JavaScript and I have the following code snippet:

const arrayToTest;
let c = seasonalityService.getAnalysis(site, key)
    .then(function (result) {
        let date = moment();
        console.log(result.heating.getSeasonMonths(date));
        arrayToTest = result.heating.getSeasonMonths(date);
        console.log(result.cooling.getSeasonMonths(date));    

    })
    , function (error) {
        console.error('an error occured!!!', error);
    };

I have aService.js where I have getAnalysis method:

aService.getAnalysis = function (site, key) {
    return Promise.all([
        aService.heat(site, key),
        aService.cool(site, key)
    ]).spread(function (heating, cooling) {
        return { heating: heating, cooling: cooling };
    });
};

I tested the first part in similar situation and it worked fine but now before I pile the code if I hover over function (error) it says [js] Variable declaration expected.

I don't understand what variable does it need.

I'm a new user of Promises in JavaScript and I have the following code snippet:

const arrayToTest;
let c = seasonalityService.getAnalysis(site, key)
    .then(function (result) {
        let date = moment();
        console.log(result.heating.getSeasonMonths(date));
        arrayToTest = result.heating.getSeasonMonths(date);
        console.log(result.cooling.getSeasonMonths(date));    

    })
    , function (error) {
        console.error('an error occured!!!', error);
    };

I have aService.js where I have getAnalysis method:

aService.getAnalysis = function (site, key) {
    return Promise.all([
        aService.heat(site, key),
        aService.cool(site, key)
    ]).spread(function (heating, cooling) {
        return { heating: heating, cooling: cooling };
    });
};

I tested the first part in similar situation and it worked fine but now before I pile the code if I hover over function (error) it says [js] Variable declaration expected.

I don't understand what variable does it need.

• javascript
• node.js
• promise

• voted to close because it's a simply typographical error – Alnitak Commented Apr 20, 2017 at 9:28
• 1 }) -> } and }; -> }); – Jaromanda X Commented Apr 20, 2017 at 9:53
• 1 const arrayToTest; without an initialiser expression is a syntax error. – Bergi Commented Apr 21, 2017 at 12:53

2 Answers 2

The message appears to relate to const arrayToTest;, which is illegal.

A const must be initialised at the point of declaration.

Read about const here.

You have

})
    , function (error) {

instead of

}
    , function (error) {