How to detect if JavaScript is disabled after loaded HTML?

Fernando · June 14, 2018 at 5:06 PM

Hi,How to detect if JavaScript is enabled after loaded HTML? Is it possible to detect it with krpano?

Greets,
Fernando.

indexofrefraction · June 14, 2018 at 5:39 PM

if javascript is disabled, there is no krpano, because krpano is javascript :)

but there are html <noscript> tags,
to display a text if js is disabled.

https://www.w3schools.com/TAGs/tag_noscript.asp

this is already used in the standard html
generated by using one of the droplets

Fernando · June 14, 2018 at 5:48 PM

Thank index, but I remember a game with buttons that it contain js code. This buttons only works when javascript are enabled. Rare, I will check this old project and comment you.
Greets,
Fernando

klaus.krpano · June 14, 2018 at 7:14 PM

Hi,

have a look into any of the krpano html files - there is a <noscript> element there - and the content of that element will be shown when Javascript is disabled.

With the default krpano html files the text 'ERROR: Javascript not activated' will be shown centered in the viewer window.

Best regards,
Klaus

Fernando · June 15, 2018 at 12:23 AM

Thanks Klaus and Index. Then as said Index:

Quote from indexofrefraction

if javascript is disabled, there is no krpano, because krpano is javascript

Then krpano always (flash too) is based javascript.
Then, for example, the klaus html_div example runs always if is loaded krpano, because javascript is enable. Never is loaded krpano without javascript enable-

Please confirm all the above
Greets,
Fernando.

klaus.krpano · June 15, 2018 at 10:38 AM

Hi,

Quote from Fernando

Then krpano always (flash too) is based javascript.

The embedding code is Javascript, so yes, without Javascript the krpano viewer will not get added to the webpage.

If you want you could additionally also embed the krpano.swf Flash viewer in the <noscript> via an <object> element, but I don't think that makes much sense - first when the user manually disables Javascript, then he probably doesn't want Flash too - and second - all the Browser workarounds and fixes to Flash that will be done by Javascript (e.g. the detection if Flash is even available or the mouse wheel support) are not available too.

Best regards,
Klaus

Fernando · June 15, 2018 at 7:02 PM

Thanks, I was confused. My old projects did not work in flash but in html5, that was the problem. The problem was not related to javascript. The solution is to avoid flash when in the code there is javascript:

Greets,
Fernando

How to detect if JavaScript is disabled after loaded HTML?

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