一行代码将使页面处于灰色模式

filter: grayscale(1);

<template>
  <div class="gray-container">
    <el-button type="primary" @click="onClick">点击</el-button>
  </div>
</template>

<script>
export default {
  methods: {
    onClick() {
      this.$message.success("点击成功");
    },
  },
};
</script>

<style>
.gray-container {
  width: 200px;
  height: 200px;
  background: url("https://picsum.photos/400/400") no-repeat center center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  /* 核心代码 */
  filter: grayscale(1);
}
</style>

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