# PasswordInput

### Intro

The PasswordInput component is usually used with [NumberKeyboard](#/en-US/number-keyboard) Component.

### Install

```js
import { createApp } from 'vue';
import { PasswordInput, NumberKeyboard } from 'vant';

const app = createApp();
app.use(PasswordInput);
app.use(NumberKeyboard);
```

## Usage

### Basic Usage

```html
<van-password-input
  :value="value"
  :focused="showKeyboard"
  @focus="showKeyboard = true"
/>
<van-number-keyboard
  v-model="value"
  :show="showKeyboard"
  @blur="showKeyboard = false"
/>
```

```js
export default {
  data() {
    return {
      value: '123',
      showKeyboard: true,
    };
  },
};
```

### Custom Length

```html
<van-password-input
  :value="value"
  :gutter="15"
  :focused="showKeyboard"
  @focus="showKeyboard = true"
/>
```

### Add Gutter

```html
<van-password-input
  :value="value"
  :gutter="10"
  :focused="showKeyboard"
  @focus="showKeyboard = true"
/>
```

### Without Mask

```html
<van-password-input
  :value="value"
  :mask="false"
  :focused="showKeyboard"
  @focus="showKeyboard = true"
/>
```

### Hint Error

Use `info` to set info message, use `error-info` prop to set error message.

```html
<van-password-input
  :value="value"
  info="Some tips"
  :error-info="errorInfo"
  :focused="showKeyboard"
  @focus="showKeyboard = true"
/>
<van-number-keyboard
  v-model="value"
  :show="showKeyboard"
  @blur="showKeyboard = false"
/>
```

```js
export default {
  data() {
    return {
      value: '123',
      errorInfo: '',
      showKeyboard: true,
    };
  },
  watch: {
    value(value) {
      if (value.length === 6 && value !== '123456') {
        this.errorInfo = 'Password Mistake';
      } else {
        this.errorInfo = '';
      }
    },
  },
};
```

## API

### Props

| Attribute  | Description                    | Type               | Default |
| ---------- | ------------------------------ | ------------------ | ------- |
| value      | Password value                 | _string_           | `''`    |
| info       | Bottom info                    | _string_           | -       |
| error-info | Bottom error info              | _string_           | -       |
| length     | Maxlength of password          | _number \| string_ | `6`     |
| gutter     | Gutter of input                | _number \| string_ | `0`     |
| mask       | Whether to mask value          | _boolean_          | `true`  |
| focused    | Whether to show focused cursor | _boolean_          | `false` |

### Events

| Event | Description                   | Arguments |
| ----- | ----------------------------- | --------- |
| focus | Emitted when input is focused | -         |

### Less Variables

How to use: [Custom Theme](#/en-US/theme).

| Name                             | Default Value   | Description |
| -------------------------------- | --------------- | ----------- |
| @password-input-height           | `50px`          | -           |
| @password-input-margin           | `0 @padding-md` | -           |
| @password-input-font-size        | `20px`          | -           |
| @password-input-border-radius    | `6px`           | -           |
| @password-input-background-color | `@white`        | -           |
| @password-input-info-color       | `@gray-6`       | -           |
| @password-input-info-font-size   | `@font-size-md` | -           |
| @password-input-error-info-color | `@red`          | -           |
| @password-input-dot-size         | `10px`          | -           |
| @password-input-dot-color        | `@black`        | -           |
