The CSS 3 filter attribute in the MVC app is leading to compilation errors

Recently, I encountered an issue with my MVC app. In an attempt to make some gradients work in IE 8, I added the following code:

filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#E65C00', endColorstr='#FFB280');

Initially, everything was working well. However, now my application refuses to compile and displays the error message:

Validation (CSS 2.1): 'filter' is not a known CSS property name

Oddly enough, this problem did not exist before. It seems like a strange turn of events.

Considering my limited knowledge of CSS3, could Visual Studio be attempting to validate using CSS 2.1? Is there a way to configure it to support CSS 3 validation instead?

asp.net-mvcvisual-studiocss

Answer №1

The 'filter' property is a unique Microsoft CSS extension that is not included in the CSS 2.1 specification. For more information, you can visit this link.

If you want to disable CSS validation errors in Visual Studio, simply go to the menu: Tools > Options. Refer to the image below for guidance. By doing this, you will be able to compile your project successfully.

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