Question

JavaScript的：

var acc = document.getElementsByClassName("togglebtn"),
    i;
for (i = 0; i < acc.length; i++) {
   acc[i].onclick = function () {
       this.classList.toggle("active");                               
   }
}

HTML：

<md-button class="md-fab togglebtn"></md-button>

的CSS：

button.togglebtn:after {
   background-color: white;
   width: auto;
   font-weight: bold;
   margin-left: 5px;
   border: none;
   content:'';
}

button.togglebtn.active:after {
   width: auto;
   background-color: green;
   content:'close';
   font-size: 10px;
}

我只能更改文字的颜色而不能更改背景颜色。当有人点击按钮时，我试图改变颜色。：在使用css后，但改变颜色不起作用。有人可以建议我，我做错了吗

Answer 1

＆＃13;

var acc = document.getElementsByClassName("togglebtn");
var i;
for (i = 0; i < acc.length; i++) {
  acc[i].onclick = function() {
    this.classList.toggle("active");
  }
}

＆＃13;

button.togglebtn.active {
  background-color: green;
  color: #fff;
}

＆＃13;

<button class="md-fab togglebtn">hello</button>

＆＃13;

Answer 2

当您使用AngularJS时，我建议您使用ng-class而不是纯JavaScript：

var myApp = angular.module('myApp', []);

.active { background-color: red; }

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp">
    <button ng-class="{active: isActive}" ng-click="isActive =! isActive">Hello</button>
</div>

Answer 3

它只是一个CSS问题，你试图设置after的样式，但你需要设置按钮的样式，然后分开：

＆＃13;

var acc = document.getElementsByClassName("togglebtn"),
  i;
for (i = 0; i < acc.length; i++) {
  acc[i].onclick = function() {
    this.classList.toggle("active");
  }
}

＆＃13;

button.togglebtn:after {
  content: '';
}

button.togglebtn.active:after {
  content: 'close';
}

button.togglebtn {
  background-color: white;
  width: auto;
  font-weight: bold;
  margin-left: 5px;
  border: none;
}

button.togglebtn.active {
  width: auto;
  background-color: green;
  content: ' close';
  font-size: 10px;
}

＆＃13;

<button class="md-fab togglebtn">hello</button>

＆＃13;

Answer 4

     .md-button.md-fab {
      line-height: 1% !important;
      min-width: 0;
      border-radius: 50%;
      position: fixed;
      margin-left: 400px;
      background-color: green;
      margin-top: -7px;
      }
      button.togglebtn:after {
        color: white;
        width: auto;
        margin-left: 5px;
        border: none;
        content:'open';
        font-size: 10px;

    }

button.togglebtn.active:after {
    width: auto;
    color: black;
    content:'close';
    font-size: 10px;
}

.md-button.md-fab {
    background-color: black !important;
}
.md-button.md-fab.active{
    background-color: yellow !important;
    content: 'yellow';
    color: white;
}

单击JavaScript更改按钮颜色

4 个答案: