In below convert method i need to add callback method.How can i do that.
var imagemagick = require('imagemagick-native');
var srcData = require('fs').readFileSync('./test/test.png');
imagemagick.convert({
srcData: srcData,
width: 100,
height: 100,
resizeStyle: "aspectfill",
quality: 80,
format: 'JPEG'
});