Validating opacity css
I'd say if the form is short and an obvious pattern (like sign up or log in), you could use the placeholder visual pattern, but use real labels instead. You don't need to do any tricky cursor stuff, because it's all semantically wired up already. In order to do that, we'll need to know if the input is empty or not.
If they click the area taken up by the label, it will activate the input. We want to do stuff with :placeholder-shown is super useful for us here!
Alpha(Opacity=40)"; Doesn't work in IE8 but will work in ie5.5 - 7 (because element haslayout via zoom property) Ie8 RC1's behaviour has changed since IE8 beta2 when it would have worked with all 4 of the below. Alpha(Opacity=40) -ms-filter: "progid: DXImage Transform. This would be the best combination to use which works in IE5.5- ie8.
Alpha(Opacity=40)" Or: filter: Alpha(Opacity=40); -ms-filter: "Alpha(Opacity=40)"; The point being that quotes around the properties are important (they need to be in place for some versions and need to missing for others). Hope that helps others as you can view the browsercam results to see what works where.
At present, around half of the existing CSS specification is covered in a very limited capacity.
Please feel free to improve the functionality of this module, and test it out, The aim of this project is to produce a module that can consume CSS property/value pairs and validate them based on the actual CSS specification.
But it does require some CSS trickery to get everything just right! Just that alone is a UX consideration all too many forms fail on.
Indeed, with this data we can cover all of these use cases (and others): css-values uses specification data gathered from Mozilla, with some overrides that make it easier for the parser to operate smoothly. Template: CSSData by Mozilla Contributors is licensed under CC-BY-SA 2.5.
The :invalid selector selects form elements with a value that does not validate according to the element's settings.
Note: The :invalid selector only works for form elements with limitations, such as input elements with min and max attributes, email fields without a legal email, or number fields without a numeric value, etc.
Here is the most up to date syntax for CSS opacity in all current browsers.
You can also make transparent images using CSS Opacity.