ion-route

Contents

• Navigation Hooks
• Interfaces
• Usage
• Properties
• Events

The route component takes a component and renders it when the Browser URL matches the url property.

note

Note: this component should only be used with vanilla and Stencil JavaScript projects. For Angular projects, use ion-router-outlet and the Angular router.

Navigation Hooks

Navigation hooks can be used to perform tasks or act as navigation guards. Hooks are used by providing functions to the beforeEnter and beforeLeave properties on each ion-route. Returning true allows navigation to proceed, while returning false causes it to be cancelled. Returning an object of type NavigationHookOptions allows you to redirect navigation to another page.

Interfaces

interface NavigationHookOptions {
  /**
   * A valid path to redirect navigation to.
   */
  redirect: string;
}

Usage

Javascript

<ion-router>
  <ion-route url="/home" component="page-home"></ion-route>
  <ion-route url="/dashboard" component="page-dashboard"></ion-route>
  <ion-route url="/new-message" component="page-new-message"></ion-route>
  <ion-route url="/login" component="page-login"></ion-route>
</ion-router>

const dashboardPage = document.querySelector('ion-route[url="/dashboard"]');
dashboardPage.beforeEnter = isLoggedInGuard;

const newMessagePage = document.querySelector('ion-route[url="/dashboard"]');
newMessagePage.beforeLeave = hasUnsavedDataGuard;

const isLoggedInGuard = async () => {
  const isLoggedIn = await UserData.isLoggedIn(); // Replace this with actual login validation
  
  if (isLoggedIn) {
    return true;
  } else {
    return { redirect: '/login' }; // If a user is not logged in, they will be redirected to the /login page
  }
}

const hasUnsavedDataGuard = async () => {
  const hasUnsavedData = await checkData(); // Replace this with actual validation
  
  if (hasUnsavedData) {
    return await confirmDiscardChanges();
  } else {
    return true;
  }
}

const confirmDiscardChanges = async () => {
  const alert = document.createElement('ion-alert');
  alert.header = 'Discard Unsaved Changes?';
  alert.message = 'Are you sure you want to leave? Any unsaved changed will be lost.';
  alert.buttons = [
    {
      text: 'Cancel',
      role: 'Cancel',
    },
    {
      text: 'Discard',
      role: 'destructive',
    }
  ];
  
  document.body.appendChild(alert);
  
  await alert.present();
  
  const { role } = await alert.onDidDismiss();
  
  return (role === 'Cancel') ? false : true;
}

Stencil

import { Component, h } from '@stencil/core';
import { alertController } from '@ionic/core';

@Component({
  tag: 'router-example',
  styleUrl: 'router-example.css'
})
export class RouterExample {
  render() {
    return (
      <ion-router>
        <ion-route url="/home" component="page-home"></ion-route>
        <ion-route url="/dashboard" component="page-dashboard" beforeEnter={isLoggedInGuard}></ion-route>
        <ion-route url="/new-message" component="page-new-message" beforeLeave={hasUnsavedDataGuard}></ion-route>
        <ion-route url="/login" component="page-login"></ion-route>
      </ion-router>
    )
  }
}

const isLoggedInGuard = async () => {
  const isLoggedIn = await UserData.isLoggedIn(); // Replace this with actual login validation
  
  if (isLoggedIn) {
    return true;
  } else {
    return { redirect: '/login' }; // If a user is not logged in, they will be redirected to the /login page
  }
}

const hasUnsavedDataGuard = async () => {
  const hasUnsavedData = await checkData(); // Replace this with actual validation
  
  if (hasUnsavedData) {
    return await confirmDiscardChanges();
  } else {
    return true;
  }
}

const confirmDiscardChanges = async () => {
  const alert = await alertController.create({
    header: 'Discard Unsaved Changes?',
    message: 'Are you sure you want to leave? Any unsaved changed will be lost.',
    buttons: [
      {
        text: 'Cancel',
        role: 'Cancel',
      },
      {
        text: 'Discard',
        role: 'destructive',
      }
    ]
  });
  
  await alert.present();
  
  const { role } = await alert.onDidDismiss();
  
  return (role === 'Cancel') ? false : true;
}

Vue

<template>
  <ion-router>
    <ion-route url="/home" component="page-home"></ion-route>
    <ion-route url="/dashboard" component="page-dashboard" :beforeEnter="isLoggedInGuard"></ion-route>
    <ion-route url="/new-message" component="page-new-message" :beforeLeave="hasUnsavedDataGuard"></ion-route>
    <ion-route url="/login" component="page-login"></ion-route>
  </ion-router>
</template>

<script>
  import { alertController } from '@ionic/vue';

  const isLoggedInGuard = async () => {
    const isLoggedIn = await UserData.isLoggedIn(); // Replace this with actual login validation
    
    if (isLoggedIn) {
      return true;
    } else {
      return { redirect: '/login' }; // If a user is not logged in, they will be redirected to the /login page
    }
  }
  
  const hasUnsavedDataGuard = async () => {
    const hasUnsavedData = await checkData(); // Replace this with actual validation
    
    if (hasUnsavedData) {
      return await confirmDiscardChanges();
    } else {
      return true;
    }
  }
  
  const confirmDiscardChanges = async () => {
    const alert = await alertController.create({
      header: 'Discard Unsaved Changes?',
      message: 'Are you sure you want to leave? Any unsaved changed will be lost.',
      buttons: [
        {
          text: 'Cancel',
          role: 'Cancel',
        },
        {
          text: 'Discard',
          role: 'destructive',
        }
      ]
    });
    
    await alert.present();
    
    const { role } = await alert.onDidDismiss();
    
    return (role === 'Cancel') ? false : true;
  }
</script>

Properties

beforeEnter

Description	A navigation hook that is fired when the route tries to enter. Returning true allows the navigation to proceed, while returning false causes it to be cancelled. Returning a NavigationHookOptions object causes the router to redirect to the path specified.
Attribute	undefined
Type	(() => NavigationHookResult ｜ Promise<NavigationHookResult>) ｜ undefined
Default	undefined

beforeLeave

Description	A navigation hook that is fired when the route tries to leave. Returning true allows the navigation to proceed, while returning false causes it to be cancelled. Returning a NavigationHookOptions object causes the router to redirect to the path specified.
Attribute	undefined
Type	(() => NavigationHookResult ｜ Promise<NavigationHookResult>) ｜ undefined
Default	undefined

component

Description	Name of the component to load/select in the navigation outlet (ion-tabs, ion-nav) when the route matches. The value of this property is not always the tagname of the component to load, in ion-tabs it actually refers to the name of the ion-tab to select.
Attribute	component
Type	string
Default	undefined

componentProps

Description	A key value { 'red': true, 'blue': 'white'} containing props that should be passed to the defined component when rendered.
Attribute	undefined
Type	undefined ｜ { [key: string]: any; }
Default	undefined

url

Description	Relative path that needs to match in order for this route to apply. Accepts paths similar to expressjs so that you can define parameters in the url /foo/:bar where bar would be available in incoming props.
Attribute	url
Type	string
Default	''

Events

Name	Description
ionRouteDataChanged	Used internally by ion-router to know when this route did change.