Dash Application fails to load with IE Compatibility View

[drRussClay]

I am hosting a Dash application internal to my organization and one of our users reported a page load error on IE 11. Investigation revealed that the user had our internal website domain listed in IE's Compatibility View settings. I confirmed on my own machine that adding the domain to compatibility view reproduced the error and removing the domain from compatibility view immediately allowed the page to load.

Is there a known workaround in Dash so that pages will load even if the domain is in compatibility view?

Screenshot of the page load error attached

[chriddyp]

Thanks for reporting @drRussClay ! This was last discussed in #275, and we decided to add the tag. In code, it's here:

dash/dash/dash.py

Lines 378 to 394 in 7361db5

	def _generate_meta_html(self):
	has_ie_compat = any(
	x.get('http-equiv', '') == 'X-UA-Compatible'
	for x in self._meta_tags)
	has_charset = any('charset' in x for x in self._meta_tags)
	tags = []
	if not has_ie_compat:
	tags.append('<meta equiv="X-UA-Compatible" content="IE=edge">')
	if not has_charset:
	tags.append('<meta charset="UTF-8"/>')
	tags = tags + [
	_format_tag('meta', x, opened=True) for x in self._meta_tags
	]
	return '\n '.join(tags)

Could you confirm that you are using the latest version of Dash that has these changes? Or, are these changes causing the new issues?

[drRussClay]

I'm using version 0.21.0, and since this fix is pretty new, I'm guessing I don't have it included. I will update and test to see if it fixes the problem. Thanks!

[chriddyp]

Thanks! You can see the list of changes in the changelog here: https://github.com/plotly/dash/blob/master/CHANGELOG.md. It looks like it's part of 0.23.1

[drRussClay]

I made the update but it doesn't solve the problem. If I add the website domain to compatibility view settings, my application will not load. I'm on Dash version 0.25.1. I also tried updating dash core components, dash html components, and dash renderer to the most current versions but it did not fix the issue. Any suggestions? I am serving the application via IIS; could that have something to do with it?

[ShahnurIslam]

I'm having the same issue, so a fix would be great!

[ngnpope]

@drRussClay - there was a bug in the meta tag definition that was fixed in v0.28.3

[gvwilson]

Hi - we are tidying up stale issues and PRs in Plotly's public repositories so that we can focus on things that are most important to our community. If this issue is still a concern, please add a comment letting us know what recent version of our software you've checked it with so that I can reopen it and add it to our backlog. (Please note that we will give priority to reports that include a short reproducible example.) If you'd like to submit a PR, we'd be happy to prioritize a review, and if it's a request for tech support, please post in our community forum. Thank you - @gvwilson