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
});
});