Dynamic speech bubble in CSS

问题

I'm trying to make something like this:

I'd like to use pure CSS. Bootstrap v3 is already loaded.

I've gotten pretty close with something like

.bubble {
                   position:relative;
                   left: 15px;
                   padding: 10px;
                   background: #FFFFCC;
                   margin: 5px 5px;
                   max-width: 250px;
                   border: #FFCC00 solid 1px;
                }

.bubble:before {
                   position:absolute;
                   content: ""; 
                   top:15px;left:-10px;
                   border-width: 10px 15px 10px 0px;
                   border-color: transparent  #FFFFCC;
                   border-style: solid;
                 }

But the result is not quite what I'm looking for.

I've searched around and fiddled a bit, but have not found an elegant solution that fits my needs.

Years ago I would have done this with tables and images, but surely there's a better way in 2015?

回答1:

Here is a 2015 version...

.bubble {
    position: relative;
    background: #FFFFCC;
    border: 1px solid #FFCC00;
    max-width:250px;
    padding:10px;
    font-family:arial;
    margin:0 auto;
    font-size:14px;
    border-radius:6px;

}
.bubble:after,
.bubble:before {
    right: 100%;
    top: 50%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
}

.bubble:after {
    border-color: rgba(255, 255, 204, 0);
    border-right-color: #FFFFCC;
    border-width: 15px;
    margin-top: -15px;
}
.bubble:before {
    border-color: rgba(255, 204, 0, 0);
    border-right-color: #FFCC00;
    border-width: 16px;
    margin-top: -16px;
}

SEE IT IN ACTION:

http://jsfiddle.net/ajahb5p1/

NOTE:

You can adjust the size of the arrow simply by changing the border-width and margin-top values in the .bubble:after definition (currently set to 15px and -15px)

To make sure it retains it's border, you would also need to change these same 2 values in the .bubble:before definition (currently set to 16px and -16px)

来源：https://stackoverflow.com/questions/31801488/dynamic-speech-bubble-in-css