angular-docs-cn/packages/core/schematics/migrations/router-preserve-query-params/README.md

Router's NavigationExtras.preserveQueryParams migration

Previously the NatigationExtras property of preserveQueryParams defined what should be done with query parameters on navigation. This migration updates the usages of preserveQueryParams to instead use the queryParamsHandling property.

Before

import { Component } from '@angular/core';
import { Router } from '@angular/router';

@Component({})
export class MyComponent {
  constructor(private _router: Router) {}

  goHome() {
    this._router.navigate('/', {preserveQueryParams: true, skipLocationChange: 'foo'});
  }
}

After

import { Component } from '@angular/core';
import { Router } from '@angular/router';

@Component({})
export class MyComponent {
  constructor(private _router: Router) {}

  goHome() {
    this._router.navigate('/', { queryParamsHandling: 'preserve', skipLocationChange: 'foo' });
  }
}