## ColorPicker 颜色选择器

用于颜色选择，支持多种格式。

### 基础用法

:::demo 使用 v-model 与 Vue 实例中的一个变量进行双向绑定，绑定的变量需要是字符串类型。

```html
<div class="block">
  <span class="demonstration">有默认值</span>
  <el-color-picker v-model="color1"></el-color-picker>
</div>
<div class="block">
  <span class="demonstration">无默认值</span>
  <el-color-picker v-model="color2"></el-color-picker>
</div>

<script>
  export default {
    data() {
      return {
        color1: '#409EFF',
        color2: null,
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const color1 = ref('#409EFF');
      const color2 = ref(null);
      return {
        color1,
        color2,
      };
    },
  });

</setup>
-->
```

:::

### 选择透明度

:::demo ColorPicker 支持普通颜色，也支持带 Alpha 通道的颜色，通过`show-alpha`属性即可控制是否支持透明度的选择。

```html
<el-color-picker v-model="color" show-alpha></el-color-picker>

<script>
  export default {
    data() {
      return {
        color: 'rgba(19, 206, 102, 0.8)',
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const color = ref('rgba(19, 206, 102, 0.8)');
      return {
        color,
      };
    },
  });

</setup>
-->
```

:::

### 预定义颜色

:::demo ColorPicker 支持预定义颜色

```html
<el-color-picker v-model="color" show-alpha :predefine="predefineColors">
</el-color-picker>

<script>
  export default {
    data() {
      return {
        color: 'rgba(255, 69, 0, 0.68)',
        predefineColors: [
          '#ff4500',
          '#ff8c00',
          '#ffd700',
          '#90ee90',
          '#00ced1',
          '#1e90ff',
          '#c71585',
          'rgba(255, 69, 0, 0.68)',
          'rgb(255, 120, 0)',
          'hsv(51, 100, 98)',
          'hsva(120, 40, 94, 0.5)',
          'hsl(181, 100%, 37%)',
          'hsla(209, 100%, 56%, 0.73)',
          '#c7158577',
        ],
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const color = ref('rgba(255, 69, 0, 0.68)');
      const predefineColors = ref([
        '#ff4500',
        '#ff8c00',
        '#ffd700',
        '#90ee90',
        '#00ced1',
        '#1e90ff',
        '#c71585',
        'rgba(255, 69, 0, 0.68)',
        'rgb(255, 120, 0)',
        'hsv(51, 100, 98)',
        'hsva(120, 40, 94, 0.5)',
        'hsl(181, 100%, 37%)',
        'hsla(209, 100%, 56%, 0.73)',
        '#c7158577',
      ]);
      return {
        color,
        predefineColors,
      };
    },
  });

</setup>
-->
```

:::

### 不同尺寸

:::demo

```html
<el-color-picker v-model="color"></el-color-picker>
<el-color-picker v-model="color" size="medium"></el-color-picker>
<el-color-picker v-model="color" size="small"></el-color-picker>
<el-color-picker v-model="color" size="mini"></el-color-picker>

<script>
  export default {
    data() {
      return {
        color: '#409EFF',
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const color = ref('409EFF');

      return {
        color,
      };
    },
  });

</setup>
-->
```

:::

### Attributes

| 参数                  | 说明                      | 类型    | 可选值                | 默认值                                                |
| --------------------- | ------------------------- | ------- | --------------------- | ----------------------------------------------------- |
| model-value / v-model | 绑定值                    | string  | —                     | —                                                     |
| disabled              | 是否禁用                  | boolean | —                     | false                                                 |
| size                  | 尺寸                      | string  | —                     | medium / small / mini                                 |
| show-alpha            | 是否支持透明度选择        | boolean | —                     | false                                                 |
| color-format          | 写入 v-model 的颜色的格式 | string  | hsl / hsv / hex / rgb | hex（show-alpha 为 false）/ rgb（show-alpha 为 true） |
| popper-class          | ColorPicker 下拉框的类名  | string  | —                     | —                                                     |
| predefine             | 预定义颜色                | array   | —                     | —                                                     |

### Events

| 事件名称      | 说明                               | 回调参数         |
| ------------- | ---------------------------------- | ---------------- |
| change        | 当绑定值变化时触发                 | 当前值           |
| active-change | 面板中当前显示的颜色发生改变时触发 | 当前显示的颜色值 |