vue怎么把按钮弄成时间轴形式

Vue中可以使用v-for指令和transition动画来实现按钮时间轴的效果。

首先，需要在Vue组件中定义一个数组来存储按钮的文本和状态：

data() {
  return {
    buttons: [
      {text: 'Step 1', active: true},
      {text: 'Step 2', active: false},
      {text: 'Step 3', active: false},
      {text: 'Step 4', active: false},
    ]
  }
}

然后，在模板中使用v-for指令来渲染按钮：

<div class="timeline">
  <div class="timeline-item" v-for="(button, index) in buttons" :key="index">
    <button :class="{active: button.active}">{{button.text}}</button>
    <div class="timeline-dot"></div>
  </div>
</div>

其中，class绑定用来设置按钮的激活状态，timeline-dot用来渲染时间轴上的小圆点。

接下来，我们需要为按钮添加点击事件，以实现按钮的状态切换：

methods: {
  setActive(index) {
    this.buttons.forEach((button, i) => {
      button.active = i === index
    })
  }
}

最后，我们可以使用transition动画来实现按钮切换时的过渡效果：

<transition name="fade">
  <div class="timeline-dot" v-if="button.active"></div>
</transition>

完整的代码如下：

<template>
  <div class="timeline">
    <div class="timeline-item" v-for="(button, index) in buttons" :key="index">
      <button :class="{active: button.active}" @click="setActive(index)">{{button.text}}</button>
      <transition name="fade">
        <div class="timeline-dot" v-if="button.active"></div>
      </transition>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      buttons: [
        {text: 'Step 1', active: true},
        {text: 'Step 2', active: false},
        {text: 'Step 3', active: false},
        {text: 'Step 4', active: false},
      ]
    }
  },
  methods: {
    setActive(index) {
      this.buttons.forEach((button, i) => {
        button.active = i === index
      })
    }
  }
}
</script>

<style scoped>
.timeline {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.timeline-item {
  display: flex;
  align-items: center;
}

button {
  border: none;
  background-color: transparent;
  color: #555;
  font-size: 18px;
  cursor: pointer;
  margin-right: 10px;
  transition: all 0.3s ease;
}

button.active {
  font-weight: bold;
  color: #007aff;
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #ccc;
  margin-left: 10px;
}

.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.3s ease;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
}
</style>