Vue主题色切换实现方案(CSS 变量 + 类名切换)

1. 定义主题变量

// styles/themes.scss
:root {
  --primary-color: #314099;
  --secondary-color: #1E3968;
  --text-color: #2c44ce;
}

[data-theme="红系主题"] {
  --primary-color: #d74146;
  --secondary-color: #c20707;
  --text-color: #db3b3b;
}

2. 在组件中使用变量

<template>
  <div class="app" :data-theme="currentTheme">
    <button @click="toggleTheme">切换主题</button>
    <div class="content">主题色内容</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      currentTheme: '蓝系主题'
    }
  },
  methods: {
    toggleTheme() {
      this.currentTheme = this.currentTheme === '蓝系主题' ? '红系主题' : '蓝系主题';
      localStorage.setItem('theme', this.currentTheme); // 保存到本地存储
    }
  },
  mounted() {
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme) this.currentTheme = savedTheme;
  }
}
</script>

<style lang="scss">
@import '@/styles/themes.scss';

.content {
  color: var(--text-color);
  background-color: var(--primary-color);
  padding: 20px;
  transition: all 0.3s ease;
}
</style>