NavigationStart

class

代表导航开始时触发的事件。

An event triggered when a navigation starts.

      
      class NavigationStart extends RouterEvent {
  constructor(id: number, url: string, navigationTrigger: "imperative" | "popstate" | "hashchange" = 'imperative', restoredState: { [k: string]: any; navigationId: number; } = null)
  navigationTrigger?: 'imperative' | 'popstate' | 'hashchange'
  restoredState?: {...}
  toString(): string

  // 继承自 router/RouterEvent
  constructor(id: number, url: string)
  id: number
  url: string
}

构造函数

      
      constructor(id: number, url: string, navigationTrigger: "imperative" | "popstate" | "hashchange" = 'imperative', restoredState: { [k: string]: any; navigationId: number; } = null)

参数

`id`	`number`
`url`	`string`
`navigationTrigger`	`"imperative" \| "popstate" \| "hashchange"`	可选. 默认值是 `'imperative'`.
`restoredState`	`object`	可选. 默认值是 `null`.

属性

属性说明

属性	说明
`navigationTrigger?: 'imperative' \| 'popstate' \| 'hashchange'`	Identifies the call or event that triggered the navigation. An `imperative` trigger is a call to `router.navigateByUrl()` or `router.navigate()`.
`restoredState?: { [k: string]: any; navigationId: number; } \| null`	The navigation state that was previously supplied to the `pushState` call, when the navigation is triggered by a `popstate` event. Otherwise null. The state object is defined by `NavigationExtras`, and contains any developer-defined state value, as well as a unique ID that the router assigns to every router transition/navigation. From the perspective of the router, the router never "goes back". When the user clicks on the back button in the browser, a new navigation ID is created. Use the ID in this previous-state object to differentiate between a newly created state and one returned to by a `popstate` event, so that you can restore some remembered state, such as scroll position.

navigationTrigger?: 'imperative' | 'popstate' | 'hashchange'

Identifies the call or event that triggered the navigation. An imperative trigger is a call to router.navigateByUrl() or router.navigate().

restoredState?: { [k: string]: any; navigationId: number; } | null

The navigation state that was previously supplied to the pushState call, when the navigation is triggered by a popstate event. Otherwise null.

The state object is defined by NavigationExtras, and contains any developer-defined state value, as well as a unique ID that the router assigns to every router transition/navigation.

From the perspective of the router, the router never "goes back". When the user clicks on the back button in the browser, a new navigation ID is created.

Use the ID in this previous-state object to differentiate between a newly created state and one returned to by a popstate event, so that you can restore some remembered state, such as scroll position.

方法

toString()
toString(): string `toString(): string` 参数没有参数。返回值 `string`

构造函数link

参数

属性link

方法link

toString() link

参数

返回值

构造函数

属性

方法

toString()