Did CSS break my heart?

问题

Following this question, I created a JSFiddle, but the output doesn't seem so good:

Here is the CSS, taken from the answer there:

#heart {
  position: relative;
  width: 100px;
  height: 90px;
  margin-top: 10px;
  /* leave some space above */
}

#heart:before {
  position: absolute;
  content: "";
  left: 50px;
  top: 0;
  width: 52px;
  height: 80px;
  background: red;
  /* assign a nice red color */
  border-radius: 50px 50px 0 0;
  /* make the top edge round */
}

#heart:before {
  -webkit-transform: rotate(-45deg);
  /* 45 degrees rotation counter clockwise */
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-transform-origin: 0 100%;
  /* Rotate it around the bottom-left corner */
  -moz-transform-origin: 0 100%;
  -ms-transform-origin: 0 100%;
  -o-transform-origin: 0 100%;
  transform-origin: 0 100%;
}

#heart:after {
  left: 0;
  /* placing the right part properly */
  -webkit-transform: rotate(45deg);
  /* rotating 45 degrees clockwise */
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-transform-origin: 100% 100%;
  /* rotation is around bottom-right corner this time */
  -moz-transform-origin: 100% 100%;
  -ms-transform-origin: 100% 100%;
  -o-transform-origin: 100% 100%;
  transform-origin: 100% 100%;
}

Did I miss something, or that love got old (it's about 2 years old)?

回答1:

I was messing around a bit with your JSfiddle and I noticed that you were only drawing one side of your heart :(

Here's the updated CSS that will fix your poor broken heart

#heart:before, #heart:after {
 position: absolute;
 content: "";
 left: 50px;
 top: 0;
 width: 52px;
 height: 80px;
 background: red;
 /* assign a nice red color */
 border-radius: 50px 50px 0 0;
 /* make the top edge round */
}

Here's a link to the working JSfiddle: https://jsfiddle.net/arfc63Le/1/

回答2:

You missed the second selector for your second CSS rule.

The four rules should be:

#heart {}
#heart:before,
#heart:after {}
#heart:before [}
#heart:after {}

Here is the full demo:

#heart {
  position: relative;
  width: 100px;
  height: 90px;
  margin-top: 10px;
}

#heart:before,
#heart:after {
  position: absolute;
  content: "";
  top: 0;
  width: 52px;
  height: 80px;
  background: red;
  border-radius: 50px 50px 0 0;
}

#heart:before {
  left: 50px;
  transform: rotate(-45deg);
  transform-origin: 0 100%;
}

#heart:after {
  left: 0;
  transform: rotate(45deg);
  transform-origin: 100% 100%;
}

<div id="heart"></div>

回答3:

Looks like you missed one of the steps. It isn't very obvious in the other answer.

You need a copy of

#heart:before {
  position: absolute;
  content: "";
  left: 50px;
  top: 0;
  width: 52px;
  height: 80px;
  background: red;
  /* assign a nice red color */
  border-radius: 50px 50px 0 0;
  /* make the top edge round */
}

for #heart:after. So you need to add the following and it works (JSFiddle)

#heart:after {
  position: absolute;
  content: "";
  left: 50px;
  top: 0;
  width: 52px;
  height: 80px;
  background: red;
  /* assign a nice red color */
  border-radius: 50px 50px 0 0;
  /* make the top edge round */
}

来源：https://stackoverflow.com/questions/36189966/did-css-break-my-heart