使用API构建二维码生成器

this 应用程序编程接口。由于某种原因,我无法找出它出了什么问题。点击 here 在JSFiddle中查看它。

<form>
    <input type="text" id="textInput" placeholder="Enter text here">
    <button type="submit" id="submitButton">Submit</button>
</form>
<!-- This image should display the QR Code. -->
<img id="resultImage" src="" alt="">

JavaScript:

var input = document.getElementById('textInput');
var button = document.getElementById('submitButton');
var image = document.getElementById('resultImage');
button.onclick = function() {
    var resultValue = "http://api.qrserver.com/v1/create-qr-code/?data=" + input.value;
    image.setAttribute("src", resultValue);
}