javascript - Add image into div and convert base64 string into thumbnail using jQuery

Question

The base64 string received into var img. Then I need to convert into an image and display it as a thumbnail. Here is my implementation:

var img = "base64 string";

<div id="img_preview" style="width:250px; height:250px;"></div>

Here is the string;

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Answer 1

Edit, Updated

Try

js

var base64_string = "/9j/4AAQSkZJRgABAgAAAQABAAD//...";
var img = document.createElement("img");
// added `width` , `height` properties to `img` attributes
img.width = "250px";
img.height = "250px";
img.src = "data:image/png;base64," + base64_string;
var preview = document.getElementById("img_preview");
preview.appendChild(img);

js (jquery library)

$("<img>", {
  "src": "data:image/png;base64," + base64_string,
  // added `width` , `height` properties to `img` attributes
  "width": "250px", "height": "250px"})
.appendTo("#img_preview");

var base64_string = 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