主题切换

点击按钮，切换主题：

vue

<template>
  <div class="basic" :class="state.theme">
    点击按钮，切换主题： <button @click="switchStyle">button</button>
  </div>
</template>

<script setup lang="ts">
import { reactive, computed } from "vue";
const state = reactive({ theme: "" });

const switchStyle = () => {
  state.theme = state.theme === "dark" ? "" : "dark";
};
</script>

<style scoped>
.basic {
  height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
  /*  */

  background: #ffffff;
  color: #2c3e50;
}

.basic button {
  padding: 3px 6px;
  border: 1px solid #2c3e50;
  border-radius: 5px;
}

.dark {
  background: #181818;
  color: rgba(235, 235, 235, 0.64);
}
</style>

参考一下 Vue 的实现

css

/* color palette from <https://github.com/vuejs/theme> */
:root {
  --vt-c-white: #ffffff;
  --vt-c-white-soft: #f8f8f8;
  --vt-c-white-mute: #f2f2f2;

  --vt-c-black: #181818;
  --vt-c-black-soft: #222222;
  --vt-c-black-mute: #282828;

  --vt-c-indigo: #2c3e50;

  --vt-c-divider-light-1: rgba(60, 60, 60, 0.29);
  --vt-c-divider-light-2: rgba(60, 60, 60, 0.12);
  --vt-c-divider-dark-1: rgba(84, 84, 84, 0.65);
  --vt-c-divider-dark-2: rgba(84, 84, 84, 0.48);

  --vt-c-text-light-1: var(--vt-c-indigo);
  --vt-c-text-light-2: rgba(60, 60, 60, 0.66);
  --vt-c-text-dark-1: var(--vt-c-white);
  --vt-c-text-dark-2: rgba(235, 235, 235, 0.64);
}

/* semantic color variables for this project */
:root {
  --color-background: var(--vt-c-white);
  --color-background-soft: var(--vt-c-white-soft);
  --color-background-mute: var(--vt-c-white-mute);

  --color-border: var(--vt-c-divider-light-2);
  --color-border-hover: var(--vt-c-divider-light-1);

  --color-heading: var(--vt-c-text-light-1);
  --color-text: var(--vt-c-text-light-1);

  --section-gap: 160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: var(--vt-c-black);
    --color-background-soft: var(--vt-c-black-soft);
    --color-background-mute: var(--vt-c-black-mute);

    --color-border: var(--vt-c-divider-dark-2);
    --color-border-hover: var(--vt-c-divider-dark-1);

    --color-heading: var(--vt-c-text-dark-1);
    --color-text: var(--vt-c-text-dark-2);
  }
}

body {
  color: var(--color-text);
  background: var(--color-background);
}

主题切换 ​

主题切换