如何在ngx-treeview中更改占位符

<ngx-treeview [placeholder]="'请选择节点'"></ngx-treeview>

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

@Component({
  selector: 'app-my-component',
  template: `
    <ngx-treeview [placeholder]="placeholder"></ngx-treeview>
  `
})
export class MyComponent {
  placeholder = '请选择节点';
}

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

@Component({
  selector: 'app-my-component',
  template: `
    <ngx-treeview [placeholder]="getPlaceholder()"></ngx-treeview>
  `
})
export class MyComponent {
  placeholder = '请选择节点';

  getPlaceholder() {
    // 根据业务逻辑返回不同的占位符
    return this.placeholder;
  }

  updatePlaceholder(newPlaceholder: string) {
    this.placeholder = newPlaceholder;
  }
}