Nestjs readFileSync return Cannot read property 'readFileSync' of undefined

Question

I trying get file using method readFileSync:

import fs from 'fs';
import path from 'path';

const templateFile = fs.readFileSync(
    path.resolve(
    __dirname,
    '../mail/templates/exampleTemplate.html',
    ),
    'utf-8',
);

Nest still return me error:

TypeError: Cannot read property 'readFileSync' of undefined

I tryied used to path: ./templates/exampleTemplate.html, but result is the same

I have a structure file:

How are you requiring the `fs` module? Can you share the code with the `require` statement? — Arun Kumar Mohan, Feb 15 '21 at 19:35
@ArunKumarMohan Your query is very helpful, I change `import` to `require`, and now get file work correctly. Thanks ;) — michal, Feb 15 '21 at 19:43
You're welcome. You can use `import` but it has to use a different syntax. I've explained in my answer. — Arun Kumar Mohan, Feb 15 '21 at 20:13

score 32 · Accepted Answer · answered Feb 15 '21 at 20:09

32

Since you're using Typescript and fs does not have a default export, you have to use import * as fs from 'fs'.

answered Feb 15 '21 at 20:09

Arun Kumar Mohan

11,517
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How is NextJS able to allow typescript files importing fs the normal way such as `import fs from 'fs'`?, is it through tsconfig.json? – Caleb Taylor Jul 31 '22 at 04:58

score 12 · Answer 2 · answered Feb 17 '21 at 04:36

12

Try

import {readFileSync} from 'fs'

answered Feb 17 '21 at 04:36

Kai Sheng Tung

400
1
10

score 0 · Answer 3 · answered Feb 15 '21 at 19:50

0

I fix it by change:

import fs from 'fs';
import path from 'path';

to:

import fs = require('fs');
import path = require('path');

answered Feb 15 '21 at 19:50

michal

1,534
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Nestjs readFileSync return Cannot read property 'readFileSync' of undefined

3 Answers3

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