I want to attach ears to messages, like in Whatsapp, how to do it using css?

CodePudding user response：

https://codepen.io/ezenith/pen/pJLypJ

Look at this

This is the first request from Google

@import url(https://fonts.googleapis.com/css?family=Open Sans:300,400);

.container {
    width: 400px;
    padding: 10px;
}

.message-blue {
    position: relative;
    margin-left: 20px;
    margin-bottom: 10px;
    padding: 10px;
    background-color: #A8DDFD;
    width: 200px;
    height: 50px;
    text-align: left;
    font: 400 .9em 'Open Sans', sans-serif;
    border: 1px solid #97C6E3;
    border-radius: 10px;
}

.message-orange {
    position: relative;
    margin-bottom: 10px;
    margin-left: calc(100% - 240px);
    padding: 10px;
    background-color: #f8e896;
    width: 200px;
    height: 50px;
    text-align: left;
    font: 400 .9em 'Open Sans', sans-serif;
    border: 1px solid #dfd087;
    border-radius: 10px;
}

.message-content {
    padding: 0;
    margin: 0;
}

.message-timestamp-right {
    position: absolute;
    font-size: .85em;
    font-weight: 300;
    bottom: 5px;
    right: 5px;
}

.message-timestamp-left {
    position: absolute;
    font-size: .85em;
    font-weight: 300;
    bottom: 5px;
    left: 5px;
}

.message-blue:after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-top: 15px solid #A8DDFD;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    top: 0;
    left: -15px;
}

.message-blue:before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-top: 17px solid #97C6E3;
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    top: -1px;
    left: -17px;
}

.message-orange:after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-bottom: 15px solid #f8e896;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    bottom: 0;
    right: -15px;
}

.message-orange:before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-bottom: 17px solid #dfd087;
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    bottom: -1px;
    right: -17px;
}

<div class="container">
    <div class="message-blue">
        <p class="message-content">This is an awesome message!</p>
        <div class="message-timestamp-left">SMS 13:37</div>
    </div>
    
    <div class="message-orange">
        <p class="message-content">I agree that your message is awesome!</p>
        <div class="message-timestamp-right">SMS 13:37</div>
    </div>
    
    <div class="message-blue">
        <p class="message-content">Thanks!</p>
        <div class="message-timestamp-left">SMS 13:37</div>
    </div>
</div>

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

CodePudding user response：

You can achieve this using Pseudo-element

.message{
  margin: 30px;
  font-family: arial;
  background: red;
  display: inline-block;
  padding: 5px 20px;
  color: #fff;
  border-radius: 7px;
  position: relative;
}
.message:before {
    content: "";
    border-bottom: 16px solid transparent;
    border-right: 15px solid red;
    border-top: 0px solid transparent;
    position: absolute;
    left: -10px;
    top: 0px;
}

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

<iframe name="sif2" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>

CodePudding user response：

.container {
  clear: both;
  position: relative;
}

.container .arrow {
  width: 14px;
  height: 20px;
  overflow: hidden;
  position: relative;
  float: left;
  top: -7px;
  right: -4px;
  transform: rotate(26deg);
}

.container .arrow .outer {
  width: 0;
  height: 0;
  border-right: 20px solid #000000;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  position: absolute;
  top: 0;
  left: 0;
}

.container .arrow .inner {
  width: 0;
  height: 0;
  border-right: 20px solid #ffffff;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  position: absolute;
  top: 0;
  left: 2px;
}

.container .message-body {
  float: left;
  width: 300px;
  height: auto;
  border: 1px solid #CCC;
  background-color: #ffffff;
  border: 1px solid #000000;
  padding: 6px 8px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  -o-border-radius: 5px;
  border-radius: 5px;
}

.container .message-body p {
  margin: 0;
}

<div class="container">
  <div class="arrow">
    <div class="outer"></div>
    <div class="inner"></div>
  </div>
  <div class="message-body">
    <p>Hello world! This is a test message to show how to make an arrow on the side of the box.</p>
  </div>
</div>

<iframe name="sif3" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>