Circle button css

问题:

I'm a beginner and very confused, as a div tag when I give the same width and height with border-radius: 50% it always becomes circle. but with the tag a in case I want to make a circle button, It doesnt work that way. This is when I try to make a circle border button clickable.

<a class="btn" href="#"><i class="ion-ios-arrow-down"></i></a>


.btn {
  height: 300px;
  width: 300px;
  border-radius: 50%;
  border: 1px solid red;
}

回答1:

For div tag there is already default property display:block given by browser. For anchor tag there is not display property given by browser. You need to add display property to it. That's why use display:block or display:inline-block. It will work.

.btn {
  display:block;
  height: 300px;
  width: 300px;
  border-radius: 50%;
  border: 1px solid red;
  
}

<a class="btn" href="#"><i class="ion-ios-arrow-down"></i></a>

回答2:

.round-button {
  width:25%;
}
.round-button-circle {
  width: 100%;
  height:0;
  padding-bottom: 100%;
  border-radius: 50%;
  border:10px solid #cfdcec;
  overflow:hidden;
        
  background: #4679BD; 
  box-shadow: 0 0 3px gray;
}
.round-button-circle:hover {
  background:#30588e;
}
.round-button a {
  display:block;
  float:left;
  width:100%;
  padding-top:50%;
  padding-bottom:50%;
  line-height:1em;
  margin-top:-0.5em;
        
  text-align:center;
  color:#e2eaf3;
  font-family:Verdana;
  font-size:1.2em;
  font-weight:bold;
  text-decoration:none;
}

<div class="round-button"><div class="round-button-circle"><a href="http://example.com" class="round-button">Button!!</a></div></div>

or very simple for <a/>

.round-button {
    display:block;
    width:80px;
    height:80px;
    line-height:80px;
    border: 2px solid #f5f5f5;
    border-radius: 50%;
    color:#f5f5f5;
    text-align:center;
    text-decoration:none;
    background: #555777;
    box-shadow: 0 0 3px gray;
    font-size:20px;
    font-weight:bold;
}
.round-button:hover {
    background: #777555;
}

<a href="http://example.com" class="round-button">Button</a>

for jsfiddle reference click here

回答3:

Add display: block;. That's the difference between a <div> tag and an <a> tag

.btn {
      display: block;
      height: 300px;
      width: 300px;
      border-radius: 50%;
      border: 1px solid red;
    }

回答4:

use this css.

.roundbutton{
          display:block;
          height: 300px;
          width: 300px;
          border-radius: 50%;
          border: 1px solid red;
          
        }

<a class="roundbutton" href="#"><i class="ion-ios-arrow-down"></i></a>

回答5:

HTML:

<div class="bool-answer">
  <div class="answer">Nej</div>
</div>

CSS:

.bool-answer {
    border-radius: 50%;
    width: 100px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}

回答6:

Though I can see an accepted answer and other great answers too but thought of sharing what I did to solve this issue (in just one line).

CSS ( Created a Class ) :

.circle {
    border-radius: 50%;
}

HTML (Added that css class to my button) :

<a class="button circle button-energized ion-paper-airplane"></a>

So Easy Right ?

Note : What I actually did was proper use of ionic classes with just one line of css.

See Result your self on this JSFiddle :

https://jsfiddle.net/nikdtu/cnx48u43/

回答7:

Here is a flat design circle button:

.btn {
  height: 80px;
  line-height: 80px;  
  width: 80px;  
  font-size: 2em;
  font-weight: bold;
  border-radius: 50%;
  background-color: #4CAF50;
  color: white;
  text-align: center;
  cursor: pointer;
}

<div class="btn">+</div>