Rounded skewed top shape in css

问题

I need to make a div that looks like this:

With text in the middle in css. I tried looking at transforms and other 3d stuff, but I couldn't figure it out, especially without ruining the text.

回答1:

You can use a skewed Y pseudo element as a background of the element. This won't affect the content :

div {
  position: relative;
  display: inline-block;
  padding: 20px 50px;
  overflow: hidden;
}
div:before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: #FFD505;
  -webkit-transform-origin: 0 0;
  -ms-transform-origin: 0 0;
  transform-origin: 0 0;
  -webkit-transform: skewY(5deg);
  -ms-transform: skewY(5deg);
  transform: skewY(5deg);
  z-index: -1;
  border-radius: 10px 10px 0 0;
}

<div>Some text</div>

• The div has overflow:hidden so that the overflowing parts of the pseudo-element are hidden.
• The pseudo element has a negative z-index so it stacks behind the content of the div
• The transform-origin is set to 0 0 so that top left of the skewed pseudo element doesn't move.

回答2:

you could use a skew'ed pseudo element for this, which ensures the text won't be skewd as well:

.wrap {
  height: 100px;
  width: 400px;
  position: relative;
  overflow: hidden;
  padding-top: 30%;
}
.wrap:before {
  content: "";
  position: absolute;
  border-radius: 5px;
  height: 100%;
  width: 100%;
  left: 0;
  top: 20%;
  background: tomato;
  transform: skewY(5deg);
  z-index: -2;
}

<div class="wrap">hello
</div>

来源：https://stackoverflow.com/questions/29073804/rounded-skewed-top-shape-in-css