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How can I show the image in the sweet alert I want to download?

The following code doesn't work for me. I want the image to appear in the swal (Sweet Alert) when the input is changed, but I don't know what is not working. I am getting the following error on the console:

Failed to execute'readAsDataURL' on 'FileReader': parameter 1 is not type 'Blob'

ENTRANCE

<input id="input" type="file" style="display:none;" onchange="muda()">

Script

<script>
            function muda(){
                var thefile = document.getElementById('input');
                var reader = new FileReader();
                    reader.onloadend = function(){
                        var imagem = reader.result;
                    }
                        if(thefile){
                            reader.readAsDataURL(thefile);
                        }
                swal({
                  title: "Esta é a imagem que pretende inserir?",
                  text: "<img src='"+imagem+"' style='width:150px;'>",
                  html:true,
                });
            }
        </script>

UPDATE

With adaneo's answer, I was able to read the filename by adding .files[0];

, but I don't know how to get the path to the image now, I tried to put a variable named image as you can see in the code, but it turnsundefined

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3 answers


The argument you are passing thefile

is a DOM element, not a file.

You want to transfer the file, not the whole item

var thefile = document.getElementById('input').files[0];

This selects the first one (and only, since it doesn't have a "plural" set) and passes it to the FileReader



reader.onloadend

is asynchronous, you have to put your swal () function inside the callback

Here's another way to do it, without inline javascript

document.getElementById('input').addEventListener('change', function() {
  var thefile = this.files[0];
  var reader  = new FileReader();
  reader.onload = function() {
    swal({
        title: "Esta é a imagem que pretende inserir?",
        text: "<img src='" + reader.result + "' style='width:150px;'>",
        html: true,
    });
  }
  reader.readAsDataURL(thefile);
}, false);
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<div onclick="imgClick(this)">
   <img src="image/img1.jpg" width="150px">

</div>

<script>
function imgClick(e){
    var src = $(e).find('img').attr('src');
    swal({
           title: "Hello World",
           text: "<img src='"+src+"' style='width:150px;'>",
           content:true,
        });
}

</script>


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along with @adeneo's answer, I would like to add more about swal. According to the latest swal documentation, it should be as follows:

swal({
  title: '<strong>HTML <u>example</u></strong>',
  type: 'info',
  html:
    'You can use <b>bold text</b>, ' +
    '<a href="//github.com">links</a> ' +
    'and other HTML tags',
});

you can put anything in the html tag of course.

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