如何在 Angular 2 应用程序中使用 fast-json-patch?

How to use fast-json-patch in Angular 2 applications?

我想在 Angular 2 应用程序中使用 "fast-json-patch" 库 (https://github.com/Starcounter-Jack/JSON-Patch)。

我试过添加:

'fast-json-patch': 'vendor/fast-json-patch/dist/json-patch-duplex.min.js'

map下的system-config.ts文件中,但在导入时不起作用fast-json-patch

这是我的 system-config.ts 文件的样子:

    import * as express from 'express';
    import {ng2engine} from 'angular2-universal-preview';

    // Angular 2
    import {App} from './src/app';

    let app = express();

    // Express View
    app.engine('.ng2.html', ng2engine);
    app.set('views', __dirname);
    app.set('view engine', 'ng2.html');


    // static files
    app.use(express.static(__dirname));


    app.use('/', (req, res) => {
      res.render('index', { App });
    });



    app.listen(3000, () => {
      console.log('Listen on http://localhost:3000');
    });

请添加您的代码,以便我查看?

1) 安装包

npm install fast-json-patch --save

2)在要使用ist的组件中,导入需要的函数:

import { compare } from 'fast-json-patch';

3) 创建 Patch 比较旧对象和新对象:

const patch = compare(oldObj, modifiedObj);

4) 打印出结果:

console.log(patch);

0:{op: "replace", path: "/firmendetails/registergericht", value: "Darmstadt xx"}
1:{op: "remove", path: "/firmendetails/handelsname"}
2:{op: "remove", path: "/firmendetails/firma"}
3:{op: "remove", path: "/firmendetails/rechtsform"}