## InputNumber

Input numerical values with a customizable range.

### Basic usage

:::demo Bind a variable to `v-model` in `<el-input-number>` element and you are set.

```html
<template>
  <el-input-number v-model="num" @change="handleChange" :min="1" :max="10"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 1
      };
    },
    methods: {
      handleChange(value) {
        console.log(value)
      }
    }
  };
</script>
```
:::

### Disabled

:::demo The `disabled` attribute accepts a `boolean`, and if the value is `true`, the component is disabled. If you just need to control the value within a range, you can add `min` attribute to set the minimum value and `max` to set the maximum value. By default, the minimum value is `0`.

```html
<template>
  <el-input-number v-model="num" :disabled="true"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 1
      }
    }
  };
</script>
```
:::

### Steps

Allows you to define incremental steps.

:::demo Add `step` attribute to set the step.

```html
<template>
  <el-input-number v-model="num" :step="2"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 5
      }
    }
  };
</script>
```
:::

### Step strictly

:::demo The `step-strictly` attribute accepts a `boolean`. if this attribute is `true`, input value can only be multiple of step.

```html
<template>
  <el-input-number v-model="num" :step="2" step-strictly></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 2
      }
    }
  };
</script>
```
:::

### Precision

:::demo Add `precision` attribute to set the precision of input value.

```html
<template>
  <el-input-number v-model="num" :precision="2" :step="0.1" :max="10"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 1
      }
    }
  };
</script>
```

:::

:::tip
The value of `precision` must be a non negative integer and should not be less than the decimal places of `step`.
:::

### Size

Use attribute `size` to set additional sizes with `medium`, `small` or `mini`.

:::demo

```html
<template>
  <el-input-number v-model="num1"></el-input-number>
    <el-input-number size="medium" v-model="num2"></el-input-number>
    <el-input-number size="small" v-model="num3"></el-input-number>
    <el-input-number size="mini" v-model="num4"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num1: 1,
        num2: 1,
        num3: 1,
        num4: 1
      }
    }
  };
</script>
```
:::

### Controls Position

:::demo Set `controls-position` to decide the position of control buttons.
```html
<template>
  <el-input-number v-model="num" controls-position="right" @change="handleChange" :min="1" :max="10"></el-input-number>
</template>
<script>
  export default {
    data() {
      return {
        num: 1
      };
    },
    methods: {
      handleChange(value) {
        console.log(value);
      }
    }
  };
</script>
```
:::

### Attributes

| Attribute      | Description          | Type      | Accepted Values       | Default  |
|----| ----| ---| ----| -----|
|value / v-model | binding value| number | — | 0 |
|min | the minimum allowed value | number | — | `-Infinity` |
|max | the maximum allowed value | number | — | `Infinity` |
|step | incremental step | number | — | 1 |
|step-strictly | whether input value can only be multiple of step | number   | — | false |
|precision | precision of input value | number | — | — |
|size | size of the component | string | large/small| — |
|disabled| whether the component is disabled | boolean | — | false |
|controls| whether to enable the control buttons | boolean | — | true |
|controls-position | position of the control buttons | string | right | - |
|name | same as `name` in native input | string | — | — |
|label | label text | string | — | — |
|placeholder | placeholder in input | string | - | - |

### Events

| Event Name | Description | Parameters |
|----| ---- | -----|
|change | triggers when the value changes | value after change |
| blur | triggers when Input blurs | (event: Event) |
| focus | triggers when Input focuses | (event: Event) |

### Methods
| Method | Description | Parameters |
|------|--------|-------|
| focus | focus the Input component | - |
| select | select the text in input element | — |

