Node js access variable inside async function

Question

I have the following function :

module.exports = {
    PDF_Function: function (url) {

        (async () => {
            console.log("Our URL => "+url);
            const url = 'http://localhost:81/site/products/travel/mpdf';
            const buffer = await Webpage.generatePDF(url);
           return '1';
        })();

    }
};

How can I access the URL value from PDF_Function: function (url) inside the async function, when I tried to console it I get the following error =>

(node:66420) UnhandledPromiseRejectionWarning: ReferenceError: Cannot access 'url' before initialization

@Adam Agreed, finding the right dupe. Let me fix that. – Praveen Kumar Purushothaman Aug 01 '19 at 13:43 — Praveen Kumar Purushothaman, Aug 01 '19 at 13:43
@Adam Updated. Thanks. – Praveen Kumar Purushothaman Aug 01 '19 at 13:43 — Praveen Kumar Purushothaman, Aug 01 '19 at 13:43

Arpit Kumar · Answer 1 · 2019-08-01T13:44:43.303

0

You should avoid same variable names:

module.exports = {
        PDF_Function: function (urlAsArgument) {

            (async () => {
                console.log("Our URL => "+ urlAsArgument);
                const url = 'http://localhost:81/site/products/travel/mpdf';
                const buffer = await Webpage.generatePDF(url);
               return '1';
            })();

        }
    };

Your argument name in PDF_Function and a const name inside your async function were same.

I hope it will help.

edited Aug 01 '19 at 13:44

answered Aug 01 '19 at 13:40

Arpit Kumar

2,179
5
28
53

What's the change you have done? – Praveen Kumar Purushothaman Aug 01 '19 at 13:41
Ah great find... – Praveen Kumar Purushothaman Aug 01 '19 at 13:42
The `argument` name and the `const` name (url) both were same. – Arpit Kumar Aug 01 '19 at 13:42
Yep, noticed it. – Praveen Kumar Purushothaman Aug 01 '19 at 13:42

Node js access variable inside async function

1 Answers1