how call function in mode_modules save-svg-as-png

import abc from ‘save-svg-as-png’;
$w.onReady( async function () {
//TODO: write your page related code here…
var vectorSrc = ‘’;
$w(‘#vectorImage1’).src = vectorSrc;
var png = await abc.saveSvgAsPng(vectorSrc,“test.png”);

});

ReferenceError: document is not defined

You can see how to use any nodeJS that you have added through the Wix Package Manager here.
https://support.wix.com/en/article/corvid-managing-external-code-libraries-with-the-package-manager

For more info about using save-svg-as-png itself, then you are best looking at their own documentation and info for them.
https://www.npmjs.com/package/save-svg-as-png

I don’t think you will be able to use this as the api requires a document or html element which is not available on Wix.