Angular 5 file-saver saveAs CSV file encoding to ANSI

I use Angular 5 + "file-saver": "^1.3.3" + "@types/file-saver": "^1.3.0"

import { saveAs } from 'file-saver';
const filename = parts[1].split('=')[1];
const blob = new Blob(['\ufeff', response.body], { type: 'text/csv' });
saveAs(blob, filename);


create UTF-8 file

import { saveAs } from 'file-saver';
const filename = parts[1].split('=')[1];
const blob = new Blob([response.body], { type: 'text/csv' });
saveAs(blob, filename);


create UTF-8 w/o BOM file

But I need create ANSI file (for Excel and an other client)

I try { type: 'text/csv;charset=ansi;' } but do not work.

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