Routing displays content of previous page too - javascript

I am building a web-page which starts with a simple login box which contains username,password with input boxes and two buttons with name login and register.
After clicking on the login button my page should route to another component which contains a navigation bar. It does route, no problem there. But the login box doesn't disappears after routing.
So after routing, navigation bar appears but the login box is still there.
APP.COMPONENT.HTML
<div class="background-image">
<router-outlet></router-outlet>
<div class="content2">
<h2 >Login</h2>
<br>
<form>
<div class="form-group">
<label style="margin: 5px">Username</label>
<input type="text" />
</div>
<div class="form-group">
<label style="margin: 7.5px">Password</label>
<input type="password" />
</div>
<div class="form-group">
<button (click)="onclick()" [disabled]="loading" class="btn btn-
primary">Login</button>
Register
</div>
</form>
</div>
</div>
APP.COMPONENT.TS
import { Component } from '#angular/core';
import { Router } from '#angular/router';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'welfareUI';
constructor(private router: Router){
}
onclick()
{
this.router.navigateByUrl('/navbar');
}
}

#Yash Anand Whatever #Adrita Sharma has said that is correct. You create a new login component and keep login html markup in login.component.html. keep only <router-outlet></router-outlet> in app.component.html Now when you click on login button it will only display you navbar.
Note- Make sure by default you have configured your route to go to login page in app.module.
routes: [{path : '', component: LoginComponent}]

This is because you have placed login html in app.component.html. <router-outlet></router-outlet> replaces the template of the current route, except that all the html in this file is constant.
You can create a separate login component. By default navigate to login component. Donot keep login html in app.component.html

Create separate component for login. Insert the HTML code in login.html and place router outlet in app.html file.

you have create loginComponent and place your login code inside it and then use router path to show login component as default
{ path: '',redirectTo: '/heroes',pathMatch: 'full'},
can refer below link
https://angular.io/guide/router#the-default-route-to-heroes

Create login component and load it initially into the router outlet.
routes: [{path : '', component: LoginComponent}]
After cliking on login button call different route you want to navigate.
routes: [{path : '/abc', component: abcComponent}]

There may be also a scenario when you are forcibly loading some component just before after router-outlet tag as in my scenario.
<div class="container">
<app-header></app-header>
<app-Product></app-Product>
<router-outlet></router-outlet>
</div>
On line number 2, I have all my router links. The main cause was line number 3 which is a component I was loading forcibly.
So after removing third line, everything was working properly. so if you are using Router-Outlet then let it decide about Components and their loadings.

Related

Angular: 7.2.14 - Yet Another Router Link Not Working Topic

Sorry to revive a question. Im using Angular 7 and Im trying to use Router Link.
This is my app-routing-module
const routes: Routes = [
{ path: 'locations' , component : LocationManagerComponent },
{ path: 'locations/create' , component : CreateEditLocationComponent },
{ path: 'locations/create/:id', component : CreateEditLocationComponent },
{ path: '404' , component : PageNotFoundComponent},
{ path: '**' , redirectTo: '/404'}
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
This is router link:
<a [routerLink] = "['/locations']" routerLinkActive="active"> test link </a>
When I click on link, nothing happens. The URL on browser changed but component is not loaded.
If I press F5, component is loaded and from that point on, routers link works.
I've tryed a lot of stackoverflow solution like writing link in any sort of variant like
<a routerLink="/locations" ...
<a [routerLink]= ['/locations'] ...
<a [routerLink]= "['/locations']" ...
With or without LinkAttive attribute. Putting
<base href="/">
in index.html etc....
Following this topic: TOPIC I've tried to include Router in my Layout component:
import { Component, OnInit } from '#angular/core';
import { ActivatedRoute } from '#angular/router';
#Component({
selector: 'app-layout',
templateUrl: './layout.component.html',
styleUrls: ['./layout.component.css']
})
export class LayoutComponent implements OnInit {
constructor(
private route : ActivatedRoute
) { }
[...]
but nothing changes.
The strange part is that after an F5, all routes works, even route to component not yet loaded.
In this topic TOPIC 2 the user resolved removing css class. I've tried to put my link in a completely cleaned component HTML and it not working (but still works after a refresh).
<p>
dashboard works!
<a routerLink = '/locations' routerLinkActive="active"> test link </a>
</p>
UPDATE: This is layout.component where route tag is.
I can't figure out how to have a Sidenav without having route-outlet inside it.
<mat-sidenav-container fullscreen>
<mat-sidenav #sidenav mode="over">
<div class="profile_container">
<span> User Name </span>
</div>
<mat-nav-list>
<mat-list-item><a [routerLink]="['/locations']" routerLinkActive="active"> Locations
</mat-nav-list>
</mat-sidenav>
<mat-sidenav-content>
<app-header (toggleSidenav)="sidenav.toggle()"></app-header>
<div style="padding: 20px 10px 10px 20px;">
<router-outlet></router-outlet>
</div>
</mat-sidenav-content>
</mat-sidenav-container>
Note: this answer is based on the previous version of your question, before you added the code of layout.component.html. So, instead of layout component, I am using the simplified dashboard component.
The below is working for me in Angular 8.1.
app.component.html
<app-dashboard></app-dashboard>
means that the DashboardComponent is contained within (is the child of) the AppComponent.
No change to the default app.component.ts
dashboard.component.html
<p>
dashboard works!
<a routerLink = '/locations' routerLinkActive="active">
Locations test link </a>
</p>
<p><a routerLink = '/locations/create' routerLinkActive="active">
Locations/create </a></p>
<p><a routerLink = '/locations/create/:id' routerLinkActive="active">
Locations/create/:id </a></p>
<p>router-outlet is below:</p>
<router-outlet></router-outlet>
All the links are working with click and with manually entering the url (eg: http://localhost:4200/locations/create/:id) in the browser and with reload (F5).
New Components
Generated using the ng generate component command:
Dashboard
LocationManager
CreateEditLocation
PageNotFound
app-routing-module.ts
The same as your file, but also added import statements for the newly generated components.
I figured what cause the problem but I can't unserstand why and I was not able to reproduce in StackBlitz.
This was my app.component.html, the root of all app:
<main>
<!-- Showing All Site Pages -->
<span *ngIf='isLogged()'>
<app-layout style="height:100%"></app-layout>
</span>
<!-- Showing Login Page -->
<div *ngIf='!isLogged()'>
<router-outlet></router-outlet>
</div>
</main>
The App-Layout code is above.
THIS NOT WORKS!
I changed it with a simply:
<main>
<app-layout style="height:100%"></app-layout>
</main>
As you see from my question, Layout has its own router-outlet.
I think the problem is the two router-outlet tag. Maybe Angular is not able to understand thats they are mutually exclusive. Maybe when I was clicking on menu, for some reason, Angular was updating the "first" router-outlet encountered and only after a refresh (F5), when the isLogged was already triggered and the app-layout was loaded directly, Angular knows which router-outlet to use.
In the new Way all pages, even Login, has to be child of AppLayout so every Layout component that's exists only if logged, has to be manually hide with *ngIf='!isLogged()'
A little price to pay to have routes works.

Vuejs: shared components used on multiple pages disappeared

right now, I'm writing a single-page-application in vue.js using vue-router. Pages like the homepage, sign-in page etc. all share a navigation and footer component. On a few pages however, I need the entire screen so that the navigation and footer shall not be displayed.
Hence, I decided to nest components and include the navigation and footer component when necessary. My problems now is, that the navigation and footer template disappeared on all pages.
Edit: A more complete demo can be found in this Github repository.
Here's a simplified version of the files I'm using:
index.html:
<div id="app">
<router-view></routerview>
</div>
router.js:
import Homepage from './homepage.vue';
import SignIn from './signin.vue';
const router = new VueRouter({
routes: [
{path: '/', component: Homepage},
{path: '/signin', component: SignIn},
]
})
homepage.vue and signin.vue components:
<template>
<navigation></navigation>
// some page-specific content
<footer-vue></footer-vue>
</template>
<script>
import Navigation from './navigation.vue';
import Footer from './footer.vue';
export default {
components: {
'navigation': Navigation,
'footer-vue': Footer,
},
}
</script>
A component without navigation and footer:
<template>
// some page-specific content
</template>
Is it even possible to nest components this way? I hope someone is able to point me into the right direction.
Both homepage.vue and signin.vue have invalid templates. e.g.
<template>
<navigation></navigation>
<h1>The homepage</h1>
<footer-vue></footer-vue>
</template>
This is not allowed as it has 3 root nodes. See https://v2.vuejs.org/v2/guide/components.html#A-Single-Root-Element
You need to wrap it to get it to work:
<template>
<div>
<navigation></navigation>
<h1>The homepage</h1>
<footer-vue></footer-vue>
</div>
</template>
Note that this limitation does not apply to functional components and is also expected to be lifted for all components in Vue 3.
Much more worrying is that you're not seeing any errors messages for this. You really need to look into that as it suggests there's something very much amiss with your development setup.
An example of the error message you should be seeing:
new Vue({
el: '#app',
template: '<div></div><div></div>'
})
<script src="https://unpkg.com/vue#2.6.10/dist/vue.js"></script>
<div id="app">
</div>

Vuejs template inheritance

How can I use template inheritance (Like what jade has, extends file.jade and then the blocks with the same name would be overwritten)?
I know that I can do everything with composition, but for components like footer and header which appear on every single page except one or two (e.g.login page) I must write them on every single component. In my app I have a two level navigation and it seems painful to repeat them on every one of those child components :(
I know that I can use jade and then inherit a jade file within my components, but it seems wrong because I would have some jade and some Vue files, is there any other way to do this?
// Component.vue
<template lang="jade">
extends ./StandardLayout
block content
router-view
</template>
// StandardLayout.Vue
<template lang="jade">
div
navbar
div.container
div.spacer
div.row
block content
<template>
What I've settled for, is a layouts folder filled with jade layouts and I use them to extend my components. I used vue-cli with webpack template.
In the most general case if you have to repeat the same HTML over and over, one option you could use is <partial>s.
<partial name="header"></partial>
<div>My content content</div>
<partial name="footer"></partial>
Where you declare partials as
Vue.partial('header', '<h3>This is the title: {{title}}</h3>')
Vue.partial('footer', '<footer>Mini footer</footer>')
However if you are building a Single Page Application the strategy you could follow is to simply have a header and a footer around your <router-view>, here is a jsfiddle that demonstrates how to do.
https://jsfiddle.net/gurghet/vdqutw2y/
<header><h1>
My title: {{title}}
</h1></header>
<p>
<a v-link="{ path: '/foo' }">Go to Foo</a>
<a v-link="{ path: '/bar' }">Go to Bar</a>
</p>
<router-view></router-view>
<footer>Such footer, many links, wow!</footer>
If you know Chinses, please look it
// Base Component
<template>
<div class="base-thing special-class">
<Button />
</div>
</template>
<script>
import Button from './ButtonClick'
export default {
components: { Button }
}
</script>
// Inheriting Component
<script>
import BaseComponent from './BaseComponent'
import Button from './OtherButton'
export default {
extends: BaseComponent
components: {
Button
}
}
</script>
The Button of Child Component will be replaced OtherButton. We can do something in the OtherButton

How to switch between login page and app with Aurelia

I'm using the Aurelia skeleton for my project. Everything seemed so intuitive, however I'm stuck with a problem which I suspect is fairly easy (if you know how).
The problem is that the app.html / app.js is initially showing a nav bar and loading some default styles.
Now I need a login page, which does not load anything but its own styles, no navbar no nothing - just its own login form.
So I tried something like this:
app.js
<template>
<div if.bind="auth.isNotAuthenticated()">
<require from="components/login/index" ></require>
<login router.bind="router"></login>
</div>
<div if.bind="auth.isAuthenticated()">
<require from="nav-bar.html" ></require>
<require from="../styles/styles.css"></require>
<div class="container" id="banner">
<div class="row">
<img src="images/logo.png" />
</div>
</div>
<nav-bar router.bind="router"></nav-bar>
<div class="page-host">
<router-view></router-view>
</div>
</div>
</template>
Obviously that doesn't work (unless you refresh the page/f5), since the app.js / app.html is the root route which is always present and never changes. But I hope the logic within the markup helps illustrate what I'm looking to solve?
I guess my if only I knew how to reload the parent route (app.js) when I navigate from the login route, on login success, to another route. And again when I logout, the parent route (app.js) should be refreshed as well once again. Then all my problems would be solved.
What am I missing here? :-)
I think aurelia's setRoot(module) function will help with this.
Here's the standard main.js file that "bootstraps" the aurelia app:
main.js
export function configure(aurelia) {
aurelia.use
.standardConfiguration()
.developmentLogging();
aurelia.start()
.then(a => a.setRoot()); // this is the equivalent of setRoot('app')
}
When setRoot is called with no arguments Aurelia looks for an app.js + app.html viewmodel and view.
We can adjust the logic to check whether the user is logged in and if not, show the login screen:
main.js
export function configure(aurelia) {
aurelia.use
.standardConfiguration()
.developmentLogging();
aurelia.start()
.then(a => {
if (userIsLoggedIn()) {
a.setRoot('app');
} else {
a.setRoot('login');
}
});
}
Then in your login view model you can call setRoot('app') after the user has successfully logged in:
login.js
import {Aurelia, inject} from 'aurelia-framework';
import {AuthService} from './my-auth-service';
#inject(Aurelia, AuthService)
export class Login {
userName = '';
password = '';
constructor(aurelia, authService) {
this.aurelia = aurelia;
this.authService = authService;
}
submit() {
// attempt to login and if successful, launch the app view model.
this.authService.login(userName, password)
.then(() => this.aurelia.setRoot('app'));
}
}
Note: if your app includes a "logout" feature that will send the user back to the login screen (eg setRoot('login')), be sure to reset the router and update the url accordingly. This will prevent issues when the user signs back in. More details in here and here.
For a working example of setRoot you can check also
https://foursails.github.io/sentry
https://github.com/foursails/sentry

Different states don't show ui-views

Intro
I'm using AngularJS with the AngularUI module to build an admin interface with several views.
I have a simple Layout for public pages which has one ui-view and another one for admin pages which has four ui-views (header, sidebar, main, footer).
Problem
The problem I have is if I set the ui-view main the public state won't display the login view, but if I won't set the ui-view main the public state will display the login view. The header, sidebar and footer work with any setting. It seems some setting is overriding another even I tried to set absolute names. Could someone explain what's going on here?
ui-view="main" ==> Login doesn't show
ui-view="" ==> Login shows
Visual layout:
Source code (index.html):
<body>
...
<div ui-view="public">
</div>
<div class="admin">
<div ui-view="header"></div>
<div ui-view="sidebar"></div>
<div class="container" style="margin-top:60px" ui-view="">
<!-- ^ add main here -->
</div>
<div ui-view="footer"></div>
</div>
...
</body>
Code example
I set up a minimal full code example to outline the problem:
Plunker Edit
Plunker Run
I've played around with your demo a little bit and had a look at the ui-router documentation.
If you change your 'public' state as shown below then it seems to work.
Original:
.state('public', {
url: '/login',
title: 'Login',
templateUrl: 'login.html'
})
Updated:
.state('public', {
url: '/login',
views: {
'main#': {
title: 'Login',
templateUrl: 'login.html'
}
}
})
Here is an updated plunkr:
http://plnkr.co/edit/okBWMPpWysS9srKrcxeG?p=preview
Is that what you're trying to do, or are you trying to set up login as a nested view?

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