How To To Base 64 Encode In Two Images In Same File

Here i have two form fields , in this i want to convert the base 64 encode from image,and after that i want to pass in JSON Format to next URL, i tried like this but i am not getti

Solution 1:

Try this:

var reader = new FileReader();
reader.onload = function(event) {
    var src= event.target.result;
    console.log(src);
};