in frontend/src/App.js [126:136]
getBase64(file, cb) {
// convert image to base64
let reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function () {
cb(reader.result.replace(/^data:image\/[a-z]+;base64,/, ""));
};
reader.onerror = function (error) {
console.log('Error: ', error);
};
}