Encode string Base64

Use the ’ nodejs-base64-encode ’ package ( https://github.com/praveenp30/nodejs-base64-encode#readme )

Backend:

//encodeString.jsw

import encode from "nodejs-base64-encode";

export function myFunction(string) {
   var base64File = encode.encode(string, 'base64');
   return base64File;
}

Page Code:

//Page Code

import {myFunction} from 'backend/encodeString.jsw';

$w.onReady(function () {
    let string = 'YOUR_API_KEY';
    myFunction(string)
    .then( (response) => {
        console.log(response); //your base64 encoded string
    });
});