Angular 工具库 | ng-hub-ui-utils

ScrollBar Service

The ScrollBar service helps manage scrollbar visibility and compensate for layout shifts when hiding scrollbars (e.g., when opening modals).

Use Case: Modal Body Lock

When opening a modal, you typically hide the body scrollbar. The ScrollBar.hide() method handles this automatically and returns a reverter function.

Code Example

import { inject } from '@angular/core';
import { ScrollBar } from 'ng-hub-ui-utils';

export class ModalService {
  private scrollBar = inject(ScrollBar);
  private revertScrollbar: (() => void) | null = null;

  openModal() {
    // Hide scrollbar and get reverter function
    this.revertScrollbar = this.scrollBar.hide();
  }

  closeModal() {
    // Restore scrollbar
    if (this.revertScrollbar) {
      this.revertScrollbar();
      this.revertScrollbar = null;
    }
  }
}