## Progress

Progress is used to show the progress of current operation, and inform the user the current status.

### Linear progress bar

:::demo Use `percentage` attribute to set the percentage. It's **required** and must be between `0-100`. You can custom text format by setting `format`.
```html
<el-progress :percentage="50"></el-progress>
<el-progress :percentage="100" :format="format"></el-progress>
<el-progress :percentage="100" status="success"></el-progress>
<el-progress :percentage="100" status="warning"></el-progress>
<el-progress :percentage="50" status="exception"></el-progress>

<script>
  export default {
    methods: {
      format(percentage) {
        return percentage === 100 ? 'Full' : `${percentage}%`;
      }
    }
  };
</script>
```
:::

### Internal percentage

In this case the percentage takes no additional space.

:::demo `stroke-width` attribute decides the `width` of progress bar, and use `text-inside` attribute to put description inside the progress bar.
```html
<el-progress :text-inside="true" :stroke-width="26" :percentage="70"></el-progress>
<el-progress :text-inside="true" :stroke-width="24" :percentage="100" status="success"></el-progress>
<el-progress :text-inside="true" :stroke-width="22" :percentage="80" status="warning"></el-progress>
<el-progress :text-inside="true" :stroke-width="20" :percentage="50" status="exception"></el-progress>
```
:::

### Custom color

You can use `color` attr to set the progress bar color. it accepts color string, function, or array.

:::demo

```html
<el-progress :percentage="percentage" :color="customColor"></el-progress>

<el-progress :percentage="percentage" :color="customColorMethod"></el-progress>

<el-progress :percentage="percentage" :color="customColors"></el-progress>
<div>
  <el-button-group>
    <el-button icon="el-icon-minus" @click="decrease"></el-button>
    <el-button icon="el-icon-plus" @click="increase"></el-button>
  </el-button-group>
</div>

<script>
  export default {
    data() {
      return {
        percentage: 20,
        customColor: '#409eff',
        customColors: [
          {color: '#f56c6c', percentage: 20},
          {color: '#e6a23c', percentage: 40},
          {color: '#5cb87a', percentage: 60},
          {color: '#1989fa', percentage: 80},
          {color: '#6f7ad3', percentage: 100}
        ]
      };
    },
    methods: {
      customColorMethod(percentage) {
        if (percentage < 30) {
          return '#909399';
        } else if (percentage < 70) {
          return '#e6a23c';
        } else {
          return '#67c23a';
        }
      },
      increase() {
        this.percentage += 10;
        if (this.percentage > 100) {
          this.percentage = 100;
        }
      },
      decrease() {
        this.percentage -= 10;
        if (this.percentage < 0) {
          this.percentage = 0;
        }
      }
    }
  }
</script>
```
:::

### Circular progress bar

:::demo You can specify `type` attribute to `circle` to use circular progress bar, and use `width` attribute to change the size of circle.
```html
<el-progress type="circle" :percentage="0"></el-progress>
<el-progress type="circle" :percentage="25"></el-progress>
<el-progress type="circle" :percentage="100" status="success"></el-progress>
<el-progress type="circle" :percentage="70" status="warning"></el-progress>
<el-progress type="circle" :percentage="50" status="exception"></el-progress>
```
:::

### Dashboard progress bar

You also can specify `type` attribute to `dashboard` to use dashboard progress bar.

:::demo

```html
<el-progress type="dashboard" :percentage="percentage" :color="colors"></el-progress>
<div>
  <el-button-group>
    <el-button icon="el-icon-minus" @click="decrease"></el-button>
    <el-button icon="el-icon-plus" @click="increase"></el-button>
  </el-button-group>
</div>

<script>
  export default {
    data() {
      return {
        percentage: 10,
        colors: [
          {color: '#f56c6c', percentage: 20},
          {color: '#e6a23c', percentage: 40},
          {color: '#5cb87a', percentage: 60},
          {color: '#1989fa', percentage: 80},
          {color: '#6f7ad3', percentage: 100}
        ]
      };
    },
    methods: {
      increase() {
        this.percentage += 10;
        if (this.percentage > 100) {
          this.percentage = 100;
        }
      },
      decrease() {
        this.percentage -= 10;
        if (this.percentage < 0) {
          this.percentage = 0;
        }
      }
    }
  }
</script>
```
:::

### Attributes
| Attribute      | Description          | Type      | Accepted Values       | Default  |
| --- | ---- | ---- | ---- | ---- |
| **percentage** | percentage, **required** | number | 0-100 | 0 |
| type | the type of progress bar | string | line/circle/dashboard | line |
| stroke-width | the width of progress bar | number | — | 6 |
| text-inside | whether to place the percentage inside progress bar, only works when `type` is 'line' | boolean | — | false |
| status | the current status of progress bar | string | success/exception/warning | — |
| color  | background color of progress bar. Overrides `status` prop | string/function/array | — | '' |
| width | the canvas width of circle progress bar | number | — | 126 |
| show-text | whether to show percentage | boolean | — | true |
