I received a file from a client today that is a template for an e-mail and in the css for the mobile version all of the class specifications were preceded with *[class]
e.g.
*[class].centertext {
somespec:0;
}
anyone know what the purpose of adding that to a class is?
thanks.
There is a yahoo fix/bug workaround that uses this technique (css classes) in html email design. There was a bug where Yahoo rendered all media queries by default, and this was the common solution.
There have been reports that Yahoo fixed the bug recently.
The square brackets are attribute selectors and the '*' is a wild card, so your client is selecting every element that has the class attribute.
来源：https://stackoverflow.com/questions/18877503/anyone-know-what-the-purpose-of-tagging-a-class-with-class