Image convert to Base64

Question

<input type="file" id="asd"/> 

I would like to get the image in base64 once the user chose that (before submitting the form)

Something like :

$(input).on('change',function(){   var data = $(this).val().base64file(); // it is not a plugin is just an example   alert(data); }); 

I read about File API and other stuffs, I would like a simple and cross-browsers solution (IE6/IE7 excluded obviously)

Any help appreciated thanks.

Answer 1

function readFile() {        if (this.files && this.files[0]) {            var FR= new FileReader();            FR.addEventListener("load", function(e) {        document.getElementById("img").src       = e.target.result;        document.getElementById("b64").innerHTML = e.target.result;      });             FR.readAsDataURL( this.files[0] );    }      }    document.getElementById("inp").addEventListener("change", readFile);

<input id="inp" type='file'>  <p id="b64"></p>  <img id="img" height="150">

_{(P.S: A base64 encoded image (String) 4/3 the size of the original image data)}

Check this answer for multiple images upload.

Browser support: http://caniuse.com/#search=file%20api
More info here: https://developer.mozilla.org/en-US/docs/Web/API/FileReader