javascript - CONVERT Image url to Base64

Question

Using an Image File, I am getting the url of an image, that needs be to send to a webservice. From there the image has to be saved locally on my system.

The code I am using:

var imagepath = $("#imageid").val();// from this getting the path of the selected image

that var st = imagepath.replace(data:image/png or jpg; base64"/"");

How to convert the image url to BASE64?

Answer 1

HTML

<img id=imageid src=https://www.google.de/images/srpr/logo11w.png>

JavaScript

function getBase64Image(img) {
  var canvas = document.createElement("canvas");
  canvas.width = img.width;
  canvas.height = img.height;
  var ctx = canvas.getContext("2d");
  ctx.drawImage(img, 0, 0);
  var dataURL = canvas.toDataURL("image/png");
  return dataURL.replace(/^data:image/(png|jpg);base64,/, "");
}

var base64 = getBase64Image(document.getElementById("imageid"));

This method requires the canvas element, which is perfectly supported.

• The MDN reference of HTMLCanvasElement.toDataURL().
• And the official W3C documentation.