Is it possible to customize button to an image?

[tonywang531]

Currently I believe the button widget allows custom icons.

Taking example from user guide:

widgets.Button(
    description='Click me',
    disabled=False,
    button_style='', # 'success', 'info', 'warning', 'danger' or ''
    tooltip='Click me',
    icon='check'
)

How about change the icon to a custom image? Is it possible? Sorry I am not too familiar with css or JavaScript. Or is it easier to do widgets.Image and add custom triggers to it?

[zerline]

See also #2518

[zerline]

And we'd like to have this background image in a variety of formats, including SVG.