Angular - routerLinkActive 和 queryParams 处理 [英] Angular - routerLinkActive and queryParams handling

问题描述

2021 年 3 月更新

Angular 团队最终为此合并了 PR，您可以查看 https://github.com/angular/angular/pull/40303 了解更多详情.

要使用它，只需输入

其中 options 将具有 IsActiveMatchOptions 的形状

export 声明接口 IsActiveMatchOptions {片段:'精确' |'忽略';矩阵参数:'精确' |'子集' |'忽略';路径:'精确' |'子集';查询参数:'精确' |'子集' |'忽略';}

或者简单地接受一个布尔值 exact

<代码>{精确:布尔值}

原始问题

我在 Angular 中使用 routerLink 如下

<a [routerLink]="['/view', 10]";[queryParams]="{'offset': 0, 'numberOfItems': 100}";queryParamsHandling=合并"><div>视图</div><div><span class="badge";[innerHtml]=viewCount"></span></div></a>

所以当 URL 看起来像这样 .active 类被添加到 li 标签

/view/10?offset=0&numberOfItems=100

如果 URL 被更改为 offset 或 numberOfItems 为不同的值，.active 类将被删除，例如.

/view/10?offset=0&numberOfItems=120

我浏览了 angular docs 并设法通过添加另一个 routerLink 使其工作，但是将其隐藏如下.

<a [routerLink]="['/view', 10]";[queryParams]="{'offset': 0, 'numberOfItems': 100}";queryParamsHandling=合并"><div>视图</div><div><span class="badge";[innerHtml]=viewCount"></span></div></a><a [routerLink]="['/view', 10]";样式=显示:无；"><div><span class="badge";[innerHtml]=viewCount"></span></div></a>

似乎上述方法有点小技巧.当路由器参数带有可选查询参数时，是否可以设置任何配置以使 routerLinkActive 工作?

解决方案

您可能会发现这很有帮助 - 扩展 RouterLinkActive - 如果项目包含字符串，则它被选中"...

import { Directive, Input, OnChanges, ElementRef, Renderer2, ChangeDetectorRef, SimpleChanges, Injector, AfterContentInit } from '@angular/core';import { Router,RouterLinkActive, RouterLink, RouterLinkWithHref } from '@angular/router';@指示({选择器:'[routerLinkActiveQS]'，exportAs: 'routerLinkActiveQS'})导出类 RouterLinkQsactiveDirective 扩展 RouterLinkActive 实现 OnChanges、AfterContentInit{@输入()设置 routerLinkActiveQS(data: string[]|string) {(<any>this).routerLinkActive = 数据;}@Input() routerLinkActiveQSContains :字符串；构造函数(注入器:注入器){超级 (injector.get(Router),injector.get(ElementRef),injector.get(Renderer2),injector.get(ChangeDetectorRef));(RouterLinkQsactiveDirective.prototype).isLinkActive = this.MyisLinkActive;}ngOnChanges(changes: SimpleChanges): void {super.ngOnChanges(changes);}ngAfterContentInit(): 无效 {super.ngAfterContentInit();}private MyisLinkActive(router: Router): (link: (RouterLink|RouterLinkWithHref)) =>布尔{const 结果 = (链接:RouterLink | RouterLinkWithHref) =>{让 resultInsde = router.isActive(link.urlTree, this.routerLinkActiveOptions.exact);resultInsde = resultInsde ||router.url.includes ( this.routerLinkActiveQSContains );返回结果插入；}返回结果；}}

Update March 2021

Angular team finally merge the PR for that, you can looks at https://github.com/angular/angular/pull/40303 for more detail.

To use it, simply put

<div routerLinkActive="active-link" [routerLinkActiveOptions]="options">
</div>

Where options will have the either the shape of IsActiveMatchOptions

export declare interface IsActiveMatchOptions {
    fragment: 'exact' | 'ignored';
    matrixParams: 'exact' | 'subset' | 'ignored';
    paths: 'exact' | 'subset';
    queryParams: 'exact' | 'subset' | 'ignored';
}

or simply accept a boolean exact

{
   exact: boolean
}

Original Question

I am using routerLink in Angular as below

<li routerLinkActive="active">
    <a [routerLink]="['/view', 10]"                 
       [queryParams]="{'offset': 0, 'numberOfItems': 100}" 
       queryParamsHandling="merge">
        <div>View</div>
        <div><span class="badge" [innerHtml]="viewCount"></span></div>
    </a>
</li>

So the .active class was added to li tag when the URL looks like

/view/10?offset=0&numberOfItems=100

If the URL was changed either offset or numberOfItems to a different value, the .active class will be removed, such as.

/view/10?offset=0&numberOfItems=120

I went through the angular docs and managed to make it works by adding another routerLink but make it hidden as below.

<li routerLinkActive="active">
    <a [routerLink]="['/view', 10]"                 
       [queryParams]="{'offset': 0, 'numberOfItems': 100}" 
       queryParamsHandling="merge">
        <div>View</div>
        <div><span class="badge" [innerHtml]="viewCount"></span></div>
    </a>
    <a [routerLink]="['/view', 10]" style="display:none;">                
        <div><span class="badge" [innerHtml]="viewCount"></span></div>
    </a>
</li>

Seem the above approach is a little hack. Is there any configuration that I can set to make routerLinkActive works when router parameter presents with optional query parameter?

解决方案

You may find this helpful - extend RouterLinkActive - an item is 'selected' if it contains a string...

import { Directive, Input, OnChanges, ElementRef, Renderer2, ChangeDetectorRef, SimpleChanges, Injector, AfterContentInit } from '@angular/core';
import { Router,RouterLinkActive, RouterLink, RouterLinkWithHref } from '@angular/router';


@Directive({
  selector: '[routerLinkActiveQS]',
  exportAs: 'routerLinkActiveQS'
})
export class RouterLinkQsactiveDirective extends RouterLinkActive implements OnChanges, AfterContentInit
 {

  @Input() 
  set routerLinkActiveQS(data: string[]|string) {
    (<any>this).routerLinkActive = data;
  }

  @Input() routerLinkActiveQSContains : string;

  constructor ( injector: Injector ) {
    super ( injector.get(Router),injector.get(ElementRef),injector.get(Renderer2),injector.get(ChangeDetectorRef));
    (<any>RouterLinkQsactiveDirective.prototype).isLinkActive = this.MyisLinkActive;
  }

  ngOnChanges(changes: SimpleChanges): void {
    super.ngOnChanges(changes); 
  }

  ngAfterContentInit(): void {
    super.ngAfterContentInit();
  }

  private MyisLinkActive(router: Router): (link: (RouterLink|RouterLinkWithHref)) => boolean {
    const result = (link: RouterLink | RouterLinkWithHref) => {
      let resultInsde = router.isActive(link.urlTree, this.routerLinkActiveOptions.exact);
      resultInsde = resultInsde || router.url.includes ( this.routerLinkActiveQSContains );
      return resultInsde;
    }
    return result;
  }

}

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