Make background fade out/in

问题

Is there any way I can use CSS3 to fade in and out a solid white background of a <div>? the content should remain visible so just the background should fade.

Any ideas using css3 transitions/transforms?

thank you for your help.

回答1:

Sure, you can use the transition property directly on the background-color:

div {
   background-color: white;    

   /* transition the background-color over 1s with a linear animation */
   transition: background-color 1s linear;
}

/* the :hover that causes the background-color to change */
div:hover {
   background-color: transparent;      
}

Here's an example of a red background fading out on :hover.

回答2:

You may find this useful for examples of image and background color fades: - http://nettuts.s3.amazonaws.com/581_cssTransitions/demos.html

However using CSS 3 to do the transition will limit the effect to browsers that don't support it.

回答3:

You could have two divs in one container div. The first div contains the white background, the second one gets the content.

Then, use a CSS3 transform to animate the opacity of the first div to zero.

来源：https://stackoverflow.com/questions/7622822/make-background-fade-out-in