API Reference

`<router-link>`

<router-link> is the component for enabling user navigation in a router-enabled app. The target location is specified with the to prop. It renders as an <a> tag with correct href by default, but can be configured with the tag prop. In addition, the link automatically gets an active CSS class when the target route is active.

<router-link> is preferred over hard-coded <a href="..."> for the following reasons:

It works the same way in both HTML5 history mode and hash mode, so if you ever decide to switch mode, or when the router falls back to hash mode in IE9, nothing needs to be changed.
In HTML5 history mode, router-link will intercept the click event so that the browser doesn't try to reload the page.
When you are using the base option in HTML5 history mode, you don't need to include it in to prop's URLs.

Applying Active Class to Outer Element

Sometimes we may want the active class to be applied to an outer element rather than the <a> tag itself, in that case, you can render that outer element using <router-link> and wrap the raw <a> tag inside:

<router-link tag="li" to="/foo">
  <a>/foo</a>
</router-link>

In this case the <a> will be the actual link (and will get the correct href), but the active class will be applied to the outer <li>.

`<router-link>` Props

to

type: string | Location

required

Denotes the target route of the link. When clicked, the value of the to prop will be passed to router.push() internally, so the value can be either a string or a location descriptor object.

<!-- literal string -->
<router-link to="home">Home</router-link>
<!-- renders to -->
<a href="home">Home</a>

<!-- javascript expression using `v-bind` -->
<router-link v-bind:to="'home'">Home</router-link>

<!-- Omitting `v-bind` is fine, just as binding any other prop -->
<router-link :to="'home'">Home</router-link>

<!-- same as above -->
<router-link :to="{ path: 'home' }">Home</router-link>

<!-- named route -->
<router-link :to="{ name: 'user', params: { userId: 123 }}">User</router-link>

<!-- with query, resulting in `/register?plan=private` -->
<router-link :to="{ path: 'register', query: { plan: 'private' }}">Register</router-link>

replace

type: boolean
default: false

Setting replace prop will call router.replace() instead of router.push() when clicked, so the navigation will not leave a history record.
```
<router-link :to="{ path: '/abc'}" replace></router-link>
```

append

type: boolean
default: false

Setting append prop always appends the relative path to the current path. For example, assuming we are navigating from /a to a relative link b, without append we will end up at /b, but with append we will end up at /a/b.
```
<router-link :to="{ path: 'relative/path'}" append></router-link>
```

active-class

type: string
default: "router-link-active"

Configure the active CSS class applied when the link is active. Note the default value can also be configured globally via the linkActiveClass router constructor option.

exact

type: boolean
default: false

The default active class matching behavior is inclusive match. For example, <router-link to="/a"> will get this class applied as long as the current path starts with /a/ or is /a.

One consequence of this is that <router-link to="/"> will be active for every route! To force the link into "exact match mode", use the exact prop:
```

<router-link to="/" exact>
```
Check out more examples explaining active link class live.

event

type: string | Array<string>
default: 'click'

Specify the event(s) that can trigger the link navigation.

exact-active-class

type: string
default: "router-link-exact-active"

Configure the active CSS class applied when the link is active with exact match. Note the default value can also be configured globally via the linkExactActiveClass router constructor option.

`<router-view>`

The <router-view> component is a functional component that renders the matched component for the given path. Components rendered in <router-view> can also contain its own <router-view>, which will render components for nested paths.

Any non-name props will be passed along to the rendered component, however most of the time the per-route data is contained in the route's params.

Since it's just a component, it works with <transition> and <keep-alive>. When using the both together, make sure to use <keep-alive> inside:

<transition>
  <keep-alive>
    <router-view></router-view>
  </keep-alive>
</transition>

`<router-view>` Props

name

type: string
default: "default"

When a <router-view> has a name, it will render the component with the corresponding name in the matched route record's components option. See Named Views for an example.

Router Construction Options

routes

type: Array<RouteConfig>

Type declaration for RouteConfig:

declare type RouteConfig = {
  path: string;
  component?: Component;
  name?: string; // for named routes
  components?: { [name: string]: Component }; // for named views
  redirect?: string | Location | Function;
  props?: boolean | Object | Function;
  alias?: string | Array<string>;
  children?: Array<RouteConfig>; // for nested routes
  beforeEnter?: (to: Route, from: Route, next: Function) => void;
  meta?: any;

  // 2.6.0+
  caseSensitive?: boolean; // use case sensitive match? (default: false)
  pathToRegexpOptions?: Object; // path-to-regexp options for compiling regex
}

mode

type: string
default: "hash" (in browser) | "abstract" (in Node.js)
available values: "hash" | "history" | "abstract"

Configure the router mode.
- hash: uses the URL hash for routing. Works in all Vue-supported browsers, including those that do not support HTML5 History API.
- history: requires HTML5 History API and server config. See HTML5 History Mode.
- abstract: works in all JavaScript environments, e.g. server-side with Node.js. The router will automatically be forced into this mode if no browser API is present.

base

type: string
default: "/"

The base URL of the app. For example, if the entire single page application is served under /app/, then base should use the value "/app/".

linkActiveClass

type: string
default: "router-link-active"

Globally configure <router-link> default active class. Also see router-link.

linkExactActiveClass

type: string
default: "router-link-exact-active"

Globally configure <router-link> default active class for exact matches. Also see router-link.

scrollBehavior

type: Function

Signature:

type PositionDescriptor =
  { x: number, y: number } |
  { selector: string } |
  ?{}

type scrollBehaviorHandler = (
  to: Route,
  from: Route,
  savedPosition?: { x: number, y: number }
) => PositionDescriptor | Promise<PositionDescriptor>

For more details see Scroll Behavior.

parseQuery / stringifyQuery

type: Function

Provide custom query string parse / stringify functions. Overrides the default.

fallback

type: boolean
default: true

Controls whether the router should fallback to hash mode when the browser does not support history.pushState but mode is set to history.

Setting this to false essentially makes every router-link navigation a full page refresh in IE9. This is useful when the app is server-rendered and needs to work in IE9, because a hash mode URL does not work with SSR.

Router Instance Properties

router.app

type: Vue instance

The root Vue instance the router was injected into.

router.mode

type: string

The mode the router is using.

router.currentRoute

type: Route

The current route represented as a Route Object.

Router Instance Methods

router.beforeEach

router.beforeResolve

router.afterEach

Signatures:

router.beforeEach((to, from, next) => {
  /* must call `next` */
})

router.beforeResolve((to, from, next) => {
  /* must call `next` */
})

router.afterEach((to, from) => {})

Add global navigation guards. See Navigation Guards for more details.

All three methods return a function that removes the registered guard/hook.

router.push

router.replace

router.go

router.back

router.forward

Signatures:

router.push(location, onComplete?, onAbort?)
router.replace(location, onComplete?, onAbort?)
router.go(n)
router.back()
router.forward()

Programmatically navigate to a new URL. See Programmatic Navigation for more details.

router.getMatchedComponents

Signature:

const matchedComponents: Array<Component> = router.getMatchedComponents(location?)

Returns an Array of the components (definition/constructor, not instances) matched by the provided location or the current route. This is mostly used during server-side rendering to perform data prefetching.

router.resolve

Signature:

const resolved: {
  location: Location;
  route: Route;
  href: string;
} = router.resolve(location, current?, append?)

Reverse URL resolving. Given location in form same as used in <router-link/>.

current is the current Route by default (most of the time you don't need to change this)
append allows you to append the path to the current route (as with router-link)

router.addRoutes

Signature:

router.addRoutes(routes: Array<RouteConfig>)

Dynamically add more routes to the router. The argument must be an Array using the same route config format with the routes constructor option.

router.onReady

Signature:

router.onReady(callback, [errorCallback])

This method queues a callback to be called when the router has completed the initial navigation, which means it has resolved all async enter hooks and async components that are associated with the initial route.

This is useful in server-side rendering to ensure consistent output on both the server and the client.

The second argument errorCallback is only supported in 2.4+. It will be called when the initial route resolution runs into an error (e.g. failed to resolve an async component).

router.onError

Signature:

router.onError(callback)

Register a callback which will be called when an error is caught during a route navigation. Note for an error to be called, it must be one of the following scenarios:

The error is thrown synchronously inside a route guard function;
The error is caught and asynchronously handled by calling next(err) inside a route guard function;
An error occurred when trying to resolve an async component that is required to render a route.

The Route Object

A route object represents the state of the current active route. It contains parsed information of the current URL and the route records matched by the URL.

The route object is immutable. Every successful navigation will result in a fresh route object.

The route object can be found in multiple places:

Inside components as this.$route
Inside $route watcher callbacks
As the return value of calling router.match(location)

Inside navigation guards as the first two arguments:

router.beforeEach((to, from, next) => {
  // `to` and `from` are both route objects
})

Inside the scrollBehavior function as the first two arguments:

const router = new VueRouter({
  scrollBehavior (to, from, savedPosition) {
    // `to` and `from` are both route objects
  }
})

Route Object Properties

$route.path
- type: string
  
  A string that equals the path of the current route, always resolved as an absolute path. e.g. "/foo/bar".
$route.params
- type: Object
  
  An object that contains key/value pairs of dynamic segments and star segments. If there are no params the value will be an empty object.
$route.query
- type: Object
  
  An object that contains key/value pairs of the query string. For example, for a path /foo?user=1, we get $route.query.user == 1. If there is no query the value will be an empty object.
$route.hash
- type: string
  
  The hash of the current route (with the #), if it has one. If no hash is present the value will be an empty string.
$route.fullPath
- type: string
  
  The full resolved URL including query and hash.
$route.matched
- type: Array<RouteRecord>
An Array containing route records for all nested path segments of the current route. Route records are the copies of the objects in the routes configuration Array (and in children Arrays):
```
const router = new VueRouter({
  routes: [
    // the following object is a route record
    { path: '/foo', component: Foo,
      children: [
        // this is also a route record
        { path: 'bar', component: Bar }
      ]
    }
  ]
})
```
When the URL is /foo/bar, $route.matched will be an Array containing both objects (cloned), in parent to child order.
$route.name

The name of the current route, if it has one. (See Named Routes)
$route.redirectedFrom

The name of the route being redirected from, if there were one. (See Redirect and Alias)

Component Injections

Component Injected Properties

These properties are injected into every child component by passing the router instance to the root instance as the router option.

this.$router

The router instance.
this.$route

The current active Route. This property is read-only and its properties are immutable, but it can be watched.

Component Enabled Options

beforeRouteEnter
beforeRouteUpdate
beforeRouteLeave

See In Component Guards.

# API Reference

# <router-link>

# Applying Active Class to Outer Element

# <router-link> Props

# to

# replace

# append

# tag

# active-class

# exact

# event

# exact-active-class

# <router-view>

# <router-view> Props

# name

# Router Construction Options

# routes

# mode

# base

# linkActiveClass

# linkExactActiveClass

# scrollBehavior

# parseQuery / stringifyQuery

# fallback

# Router Instance Properties

# router.app

# router.mode

# router.currentRoute

# Router Instance Methods

# router.beforeEach

# router.beforeResolve

# router.afterEach

# router.push

# router.replace

# router.go

# router.back

# router.forward

# router.getMatchedComponents

# router.resolve

# router.addRoutes

# router.onReady

# router.onError

# The Route Object

# Route Object Properties

# Component Injections

# Component Injected Properties

# Component Enabled Options

API Reference

`<router-link>`

Applying Active Class to Outer Element

`<router-link>` Props

to

replace

append

tag

active-class

exact

event

exact-active-class

`<router-view>`

`<router-view>` Props

name

Router Construction Options

routes

mode

base

linkActiveClass

linkExactActiveClass

scrollBehavior

parseQuery / stringifyQuery

fallback

Router Instance Properties

router.app

router.mode

router.currentRoute

Router Instance Methods

router.beforeEach

router.beforeResolve

router.afterEach

router.push

router.replace

router.go

router.back

router.forward

router.getMatchedComponents

router.resolve

router.addRoutes

router.onReady

router.onError

The Route Object

Route Object Properties

Component Injections

Component Injected Properties

Component Enabled Options