vant/src/nav-bar/README.md
2021-11-15 11:50:53 +08:00

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# NavBar
### Install
```js
import Vue from 'vue';
import { NavBar } from 'vant';
Vue.use(NavBar);
```
## Usage
### Basic Usage
```html
<van-nav-bar
title="Title"
left-text="Back"
right-text="Button"
left-arrow
@click-left="onClickLeft"
@click-right="onClickRight"
/>
```
```js
import { Toast } from 'vant';
export default {
methods: {
onClickLeft() {
Toast('Back');
},
onClickRight() {
Toast('Button');
},
},
};
```
### Use Slot
```html
<van-nav-bar title="Title" left-text="Back" left-arrow>
<template #right>
<van-icon name="search" />
</template>
</van-nav-bar>
```
## API
### Props
| Attribute | Description | Type | Default |
| --- | --- | --- | --- |
| title | Title | _string_ | `''` |
| left-text | Left Text | _string_ | `''` |
| right-text | Right Text | _string_ | `''` |
| left-arrow | Whether to show left arrow | _boolean_ | `false` |
| border | Whether to show bottom border | _boolean_ | `true` |
| fixed | Whether to fixed top | _boolean_ | `false` |
| placeholder `v2.5.9` | Whether to generate a placeholder element when fixed | _boolean_ | `false` |
| z-index | Z-index | _number \| string_ | `1` |
| safe-area-inset-top `v2.10.13` | Whether to enable top safe area adaptation | _boolean_ | `false` |
### Slots
| Name | Description |
| ----- | ------------------------- |
| title | Custom title |
| left | Custom left side content |
| right | Custom right side content |
### Events
| Event | Description | Arguments |
| ----------- | ---------------------------------------- | --------- |
| click-left | Emitted when the left button is clicked | - |
| click-right | Emitted when the right button is clicked | - |
### Less Variables
How to use: [Custom Theme](#/en-US/theme).
| Name | Default Value | Description |
| ------------------------- | --------------- | ----------- |
| @nav-bar-height | `46px` | - |
| @nav-bar-background-color | `@white` | - |
| @nav-bar-arrow-size | `16px` | - |
| @nav-bar-icon-color | `@blue` | - |
| @nav-bar-text-color | `@blue` | - |
| @nav-bar-title-font-size | `@font-size-lg` | - |
| @nav-bar-title-text-color | `@text-color` | - |
| @nav-bar-z-index | `1` | - |