方式一：属性绑定

1. 原始样式

<template>
  <div id="app">
    <h1>示例1 属性绑定</h1>
    <div class="myStyle">测试</div>
  </div>
</template>

<script>
export default {
  name: "app",
};
</script>

<style>
.myStyle {
  margin: 10px;
  padding: 5px;
  width: 200px;
  height: 100px;
  background: aquamarine;
  border: 1 #000 solid;
}
</style>

2. 绑定按钮响应属性

（1）基础版

<div :class="{ myStyle: true }">测试</div>

通过改变boolean值，来动态绑定

（2）升级版

<div :class="{ myStyle: m_changeColor }">测试</div>

（3）按钮控制属性变化

<div @click="{ m_changeColor = !m_changeColor; }" :class="{ myStyle: m_changeColor }">测试 </div>

（4）完整代码

<template>
  <div id="app">
    <h1>示例1 属性绑定</h1>
    <div @click="{ m_changeColor = !m_changeColor; }" :class="{ myStyle: m_changeColor }">测试 </div>
  </div>
</template>

<script>
export default {
  name: "app",
  data() {
    return {
      m_changeColor: true
    }
  }
};
</script>

<style>
.myStyle {
  margin: 10px;
  padding: 5px;
  width: 200px;
  height: 100px;
  background: aquamarine;
  border: 1 #000 solid;
}
</style>

方式二：计算属性绑定

1. 计算属性

  completed: {
    completeColor() {
      return { myStyle: this.m_changeColor };
    },
  },

2. 完整代码

<template>
  <div id="app">
    <h1>示例1 属性绑定</h1>
    <div @click=" { m_changeColor = !m_changeColor; }" :class="{ completeColor }" >测试</div>
  </div>
</template>

<script>
export default {
  name: "app",
  data() {
    return {
      m_changeColor: true
    }
  },
  completed: {
    completeColor() {
      return { myStyle: this.m_changeColor };
    },
  },
};
</script>

<style>
.myStyle {
  margin: 10px;
  padding: 5px;
  width: 200px;
  height: 100px;
  background: aquamarine;
  border: 1 #000 solid;
}
</style>