ButtonIcon to download to file

In Panel 1.4.0, there’s button icons! Here, I use it to copy content from the code editor and download.

import panel as pn

value = "print('Hello World')"
code_editor = pn.widgets.CodeEditor(
    value=value, language="python", sizing_mode="stretch_both", min_height=300
download_icon = pn.widgets.ButtonIcon(icon="download", toggle_duration=1000)
    args={"code_editor": code_editor},
    var text = code_editor.code;
    var blob = new Blob([text], {type: 'text/plain'});
    var url = window.URL.createObjectURL(blob);
    var a = document.createElement('a');
    a.href = url;
    a.download = 'script.py';
    document.body.appendChild(a); // we need to append the element to the dom -> otherwise it will not work in firefox
    a.parentNode.removeChild(a);  //afterwards we remove the element again
pn.Column(download_icon, code_editor).show()
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