如何为动作列ng2-smart-table添加工具提示

npm install ng2-smart-table

import { Component } from '@angular/core';
import { LocalDataSource } from 'ng2-smart-table';

settings = {
  columns: {
    id: {
      title: 'ID'
    },
    name: {
      title: 'Name'
    },
    actions: {
      title: 'Actions',
      type: 'html',
      valuePrepareFunction: (cell, row) => {
        return '<button class="btn btn-primary" title="Edit">Edit</button>';
      }
    }
  }
};

source: LocalDataSource = new LocalDataSource();

ngOnInit() {
  this.source.load(data); // 将数据加载到数据源中
}

<ng2-smart-table [settings]="settings" [source]="source"></ng2-smart-table>