New version of dash-renderer causes "fetch not found" error in IE11 when redirecting user via callback

Dash Python
1

Maybe I’m doing something horribly wrong, I’m trying to redirect the user under certain circumstances, this code was working in IE11 fine until I updated dash.

On the following versions (installed via conda-forge) I don’t see the bug:

  • dash=0.26.6=py_0
  • dash-core-components=0.28.3=py_0
  • dash-html-components=0.12.0=py_0
  • dash-renderer=0.13.2=py_0
  • plotly=3.3.0=py37h28b3542_0

On the following versions I do see the bug:

  • dash=0.28.2=py_0
  • dash-core-components=0.33.0=py_0
  • dash-html-components=0.13.2=py_0
  • dash-renderer=0.14.1=py_0
  • plotly=3.3.0=py37h28b3542_0

Here is simplest version of the code to reproduce the bug:

import dash
import dash_core_components as dcc
import dash_html_components as html

app = dash.Dash(__name__)
app.css.config.serve_locally = True
app.scripts.config.serve_locally = True

app.layout = html.Div([
    dcc.Location(refresh=True, id='URL_OUT'),
    dcc.Location(refresh=False, id='URL_IN')
    ])

external_url = 'https://www.google.com'


@app.callback(output=dash.dependencies.Output('URL_OUT', 'href'),
              inputs=[dash.dependencies.Input('URL_IN', 'pathname')])
def login_callback(pathname):
    return external_url


if __name__ == '__main__':
    app.run_server(port=8050, host='0.0.0.0')

Let me know if I’m doing something horribly wrong, this is a known bug, or I should report it somewhere specific. In both cases it executes fine in Chrome.

1 Like
2

Seems this was the same error: On IE11 getting error SCRIPT5009: 'fetch' is undefined

And was fixed with dash-renderer-0.14.3: https://github.com/plotly/dash-renderer/issues/87

1 Like