VUE中如何动态绑定类名和样式

<template>
  <div>
    <div :class="classObj">动态绑定对象</div>
    <div :class="['namebox', activeStatus ? 'activeNamebox' : '']">
      动态绑定数组
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      classObj: {
        namebox: true,
        activeNamebox: false
      },
      activeStatus: false
    }
  }
}
</script>
<style>
.namebox {
  color: #777;
}
.activeNamebox {
  background-color: aquamarine;
}
</style>

<template>
  <div>
    <div :style="styleObj1">对象形式</div>
    <div :style="[styleObj1, styleObj2]">数组形式</div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      styleObj1: {
        color: '#eee'
      },
      styleObj2: {
        textAlign: center
      }
    }
  }
}
</script>
<style></style>

<div :style="{ color: activeColor, fontSize: fontSize + 'px' }"></div>
<div :style="{color:(index == 1 ? conFontColor:'#000')}"></div>

<div :style="[baseStyles, overridingStyles]"></div>
<div :style="[{color:(index == 1 ? conFontColor:'#000')},{fontSize:'18px'}]"></div>

<div :style="{color:(index == 1 ? conFontColor:'#000')}"></div>
<div :style="[{color:(index == 1 ? conFontColor:'#000')},{fontSize:'18px'}]"></div>
<div :style="item.layerName === activeLayerName?'font-weight:700' : 'font-weight:400'"></div>
<!-- 写法一 -->
<div :style="[{float: id === '12' ? 'left:'right}]"></div>
<!-- 写法二 -->
<div :style="float: nameList.length === 20 ? 'height:64px' : 'height:32px' "></div>
<!-- 写法三 -->
<div :style="{border:( nameId ===item.id ?'2px solid #4C78FF': 'red')}"></div>

<div :style="styleObject"></div>
<script>
    data() {
        return{
          styleObject: {
            color: 'red',
            fontSize: '14px'
          }  
        }
    }
</scrip>

<!-- isActive —— true/false -->
<div :class="{ 'active': isActive  }">{{name}}</div> 

<div :class="{'active' : isActive == -2}"  >{{name}}</div>
<div :class="{'active' : isActive == item.nameId}"  >{{item.name}}</div>

<div :class="{ 'active': isActive, 'user': isUser }"></div>

<div :class="classObject">{{name}}</div>
<script>
data() {
  return {
    classObject:{ active: true, user:false }
  }
}
</script>

<div :class="classObject">{{name}}</div>
<script>
data() {
  return {
    isActive: true,
    isUser: false
  }
},
computed: {
  classObject: function () {
    return {
      active: this.isActive,
      user:this.isUser
    }
  }
}
</script>

<div :class="[isActive,isUser]">{{name}}</div>
<script>
data() {
  return{
    isActive:'active',
    isUser:'user'
 }
}
</script>

:class="[isActive?‘active':'']"
或者
:class="[isActive1?‘active':'']"
或者
:class="[isActiveindex?‘active':'']"
或者
:class="[isActive==index?‘active':‘otherActiveClass']"

//前面这个active在对象里面可以不加单引号，后面这个sort要加单引号
:class="[{ active: isActive }, ‘sort']"
或者
:class="[{ active: isActive1 }, ‘sort']"
或者
:class="[{ active: isActiveindex }, ‘sort']"