node.js – 如何读取Angular-4资产中的csv文件

我是angular-4的新手,我想从angular-4资源目录中读取一个csv文件,文件大小为5mb,我不想从 django后端服务器读取这个文件,因为这个文件只显示演示图而且我不需要向服务器发送5mb额外请求,谢谢
目前我按照这个堆栈溢出 question

文件阅读

private fs = require('fs');

readCsvData () {
    let allText = this.fs.readFileSync('assets/demo-Results.csv', 'utf8');
    console.log(allText)
    // this.extractData(allText);
}

错误是：

ShowDemoResultsComponent.html:17 ERROR TypeError: this.fs.readFileSync
is not a function
at ShowDemoResultsComponent.webpackJsonp…/../../../../src/app/show-demo-results/show-demo-results.component.ts.ShowDemoResultsComponent.readCsvData
(show-demo-results.component.ts:119)
at Object.eval [as handleEvent] (ShowDemoResultsComponent.html:17)
at handleEvent (core.es5.js:12023)
at callWithDebugContext (core.es5.js:13493)
at Object.debugHandleEvent [as handleEvent] (core.es5.js:13081)
at dispatchEvent (core.es5.js:8615)
at core.es5.js:9226
at HTMLButtonElement. (platform-browser.es5.js:2651)
at ZoneDelegate.webpackJsonp…/../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask
(zone.js:425)
at Object.onInvokeTask (core.es5.js:3881)

如果您使用新的HttpClient类(@ angular / common / http),则必须将responseType设置为’text’,否则HttpClient类将尝试将内容解释为json并引发SyntaxError …

e.g.:
this.http.get('assets/file.csv', {responseType: 'text'})
    .subscribe(
        data => {
            console.log(data);
        },
        error => {
            console.log(error);
        }
    );