Still a bug a year later

On Tuesday, March 12, 2019 at 2:37:37 PM UTC-4, Kalcifer Kandari wrote:
>
> Any progress on this bug? I'm planning to have a lot of video content on 
> my site and the lack of controls will obviously be a big problem.
>
> To emphasise my last post, this happens with the *default theme* with *no 
> adjustments* to the custom CSS. The error is caused by the 'controls' 
> attribute of the <video> HTML tag, and shows up when the Tiddler is opened. 
> It happens with any story view as well.
>
> Example code within a normal Tiddler:
>
> <video autoplay controls>  
>   <source src="path/to/video.mp4" type="video/mp4">  
>   Your browser does not support the video tag.
> </video>
>
> I was tempted to use CSS to hide all error messages entirely, but even 
> though the message is not visible, HTML gets added over and over. This 
> could be considered a memory leak because there would not be any ability to 
> close them, eventually causing a slow browser for extended sessions with a 
> lot of video content.
>
> Some way to suppress that specific error would be nice.
>
> Kalcifer
>
> On Wed, Jan 23, 2019 at 8:26 AM Kalcifer Kandari <[email protected] 
> <javascript:>> wrote:
>
>> The error is caused by adding the 'controls' attribute to the <video> 
>> HTML tag.
>>
>> A workaround is to just remove it because without the tag users can 
>> 'right click -> Show controls'. Of course if autoplay is not enabled it 
>> might be easy to miss that it is actually a video and not an image.
>>
>> Kalcifer
>>
>> On Tue, Jan 22, 2019 at 12:22 PM Kalcifer Kandari <[email protected] 
>> <javascript:>> wrote:
>>
>>> I tried all sorts of different things, including using an <iframe> tag 
>>> instead of <video>. The <iframe> did not generate any error message, but 
>>> height of the <iframe> did not adapt when the tiddler got thinner, whereas 
>>> the <video> tag does. I also tried creating a HTML file with a <video> tag 
>>> inside, then including that file in an <iframe> within the tiddler, that 
>>> also did not generate any errors, but that still had the fixed height issue.
>>>
>>> Here is the HTML for the video, which is inside the tiddler 
>>> http://kalcifer.net/#Nodius:
>>>
>>> <video width="100%" height="100%" controls loop autoplay>  
>>>   <source src="2019_01_22_07_34_06_2.mp4" type="video/mp4">  
>>>   Your browser does not support the video tag.
>>> </video>
>>>
>>> Here is the CSS for that tag from the custom CSS tiddler 
>>> http://kalcifer.net/#Custom%20CSS:
>>>
>>> video { 
>>>     width: 100% !important; 
>>>     max-width: 960px !important; 
>>>     display: block; 
>>>     margin-left: auto; 
>>>     margin-right: auto; 
>>> }
>>>
>>> Go ahead and edit the tiddlers in your browser and see what changes.
>>>
>>> Kalcifer
>>>
>>>
>>>
>>> On Tue, Jan 22, 2019 at 11:50 AM Jeremy Ruston <[email protected] 
>>> <javascript:>> wrote:
>>>
>>>> This error appears to be common, and the consensus is that it is 
>>>> harmless. See this StackOverflow answer for instance:
>>>>
>>>> https://stackoverflow.com/a/50387233
>>>>
>>>> But, of course, it’s not harmless for TW5 since we have a global error 
>>>> trap that reports it to the user; without that error trap it would just be 
>>>> another red message visible in the developer console.
>>>>
>>>> I think we need more investigation to see whether the problem is 
>>>> triggered by some specific CSS on your site, or if the problem occurs with 
>>>> the standard TW5 theme. That may show a way to avoid it through rephrasing 
>>>> your CSS.
>>>>
>>>> Otherwise, we’ll have to investigate ways of suppressing the error. 
>>>> Perhaps by adding support for a safelist of errors that should be ignored.
>>>>
>>>> Best wishes
>>>>
>>>> Jeremy
>>>>
>>>> On 22 Jan 2019, at 09:29, Kalcifer Kandari <[email protected] 
>>>> <javascript:>> wrote:
>>>>
>>>> I don't use any plugins. You can see the configuration of the wiki 
>>>> using the link I posted, nothing is hidden. I don't think it is caused by 
>>>> CSS, but that's at http://kalcifer.net/#Custom%20CSS, the relevant 
>>>> style is under 'video' near the top.
>>>>
>>>> On Tuesday, January 22, 2019 at 9:12:15 AM UTC, PMario wrote:
>>>>>
>>>>> hi,
>>>>> which plugins do you use?
>>>>> -m
>>>>>
>>>>
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>>>

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