如何有条件地禁用 routerLink 属性?

在我的 Angular 2应用程序中,我试图禁用一个 routerLink,但是没有成功。我曾经尝试处理 click事件上的 click 事件(使用 event.preventDefault()event.stopPropagation()) ,但是它不起作用。

如何禁用路由器连结?

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Disable pointer-events on the element via CSS:

<a [routerlink]="xxx" [class.disabled]="disabled ? true : null">Link</a>


a.disabled {
pointer-events: none;
cursor: default;
}

See also Angular2, what is the correct way to disable an anchor element?

or

<a *ngIf="isEnabled" [routerlink]="xxx">Link</a>
<div *ngIf="!isEnabled">not a link</div>

or to easily reuse the disabled link template

<ng-template #disabledLink>
<div *ngIf="!isEnabled">not a link</div>
</ng-template>
<a *ngIf="isEnabled; else disabledLink" [routerLink]="xxx">Link</a>

Angular 13 and above

[routerLink]="null" (and undefined) is now officially used to disable the routerLink.
(see Docs)

So this is enough:

<a [routerLink]="linkEnabled ? 'path' : null">Link</a>

Angular 12 and below

[routerLink]="null" (and undefined) is treated as a shorthand for an empty array of commands. So it makes the routerLink to link to the current/active route. This behavior allows us to abuse the routerLinkActive directive for our purpose:

Template:

<a [routerLink]="linkEnabled ? 'path' : null"
[routerLinkActive]="linkEnabled ? 'is_active' : 'is_disabled'">Link</a>

Optional CSS:

.is_disabled {
cursor: default;
text-decoration: none;
}


.is_active {
// your style for active router link
}

Live demo (Angular 10):
See demo on StackBlitz

Detailed Description:

When linkEnabled returns false, null will make routerLink to link to the current/active route.

If routerLink links to the active route, the class which is specified in routerLinkActive will be applied. That will be is_disabled in this case.

There we can specify, how the disabled routerLink should appear.

routerLink to the active route won't trigger a navigation event.

I've just had some success with a similar issue: having an array of nav links in an ngFor, some required [routerLink], while others required (click) - my issue was that all links relied on [routerLink] for [routerLinkActive], so I had to stop routerLink, without touching it's value.

`<a [routerLink]="item.link" routerLinkActive="isActive">
<span (click)="item.click ? item.click($event) : void>
</a>`

with:

`click: ($event) => {
$event.stopPropagation(); // Only seems to
$event.preventDefault(); // work with both
// Custom onClick logic
}`

As the span is inside, you can be sure the cancelling of the event happens before it bubbles up to [routerLink], while routerLinkActive will still apply.

Disabling pointer-events on any html tag:

<div [routerLink]="['/home', { foo: bar }]"
[ngStyle]="{'pointer-events': myLinkEnabled ? 'none' : null}">
Click me
</div>

'none' resolves to disabling pointer-events, that is, disabling the link.

null resolves to ignore the style.

Unfortunately, Angular doesn't seem to have a null value support for the routerLink.

However, this works for me. An example of my menu implementation:

<div *ngFor="let category of categories" [routerLink]="category.subcategories ? [] : [category.link]" (click)="toggleSubcategories(category)">

Simply put, if a category has any subcategories, don't redirect, but open the subcategories.

Try this:

<div *ngFor="let childitem of menuitem.MenuRoutes">
<a [routerLink]="menuitem.IsMain ? [childitem.Route] : []"><a>
</>

All the top answer are workaround.

The best way is something you can find in this solution https://stackoverflow.com/a/45323200/3241192 by @taras-d

Another way to disable routerLink - replace onClick method.

To do this you have to create directive:

import { Directive, Input, Optional } from '@angular/core';
import { RouterLink, RouterLinkWithHref } from '@angular/router';


@Directive({
selector: '[routerLink][disableLink]'
})
export class DisableLinkDirective {


@Input() disableLink: boolean;


constructor(
// Inject routerLink
@Optional() routerLink: RouterLink,
@Optional() routerLinkWithHref: RouterLinkWithHref
) {


const link =  routerLink || routerLinkWithHref;


// Save original method
const onClick = link.onClick;


// Replace method
link.onClick = (...args) => {
if (this.disableLink) {
return routerLinkWithHref? false: true;
} else {
return onClick.apply(link, args);
}
};
}


}

Usage:

<a routerLink="/search" [disableLink]="!isLogged">Search</a>

My case was to use routerLink, sometimes use click to open modal, and internal logic of route URL if we don't provide routerLink URL. So for click, I had to delete routerLink.

[routerLink]="disableRouterLink ? null : (btnRouterLink || pathCondition)"

in my case, null deletes routerLink attribute, and I can use (click) event properly.

P.S. empty array [] provided in answers abowe doesn't remove attribute routerlink from the element.