So that I can implement a live preview for uploadable HTML files, I need help decoding the base64 string.

When I pass a file to the input element and read it with `FileReader()`, I get a base64 encoded string.

What do I have to do to convert it to HTML/TXT?

I already found some stuff about decoding pictures, which unfortunately didn't help me.

```
handleFileUpload() {
          this.file = this.$refs.file.files[0];
          let reader = new FileReader();

          reader.addEventListener("load", function() {
            this.html = atob(reader.result);
          }.bind(this), false);

          reader.readAsDataURL(this.file);
        },

```

Output:

```
data:text/html;base64,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......

```