fs is not defined error when readFileSync is passed a path variable

I’m getting the following error when I run this with the brfs transform.

var temp = fs.readFileSync(template_path, 'utf8');
           ^
ReferenceError: fs is not defined
...

Test 1:

var fs  = require('fs');
var temp = fs.readFileSync('./templates/test.html', 'utf8');
console.log(temp);

If I run this with node test.js, or

browserify test.js -o output.js -t brfs
node output.js

I get the expected ‘hello world’ content from test.html output to the console. The contents of output.js looks like this:

(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){

/* Test 1 */
var temp = "hello world";
console.log(temp);

},{}]},{},[1]);

However if I do the same with Test 2:

var fs  = require('fs');
var template_path = './templates/test.html';
var temp = fs.readFileSync(template_path, 'utf8');
console.log(temp);

node test.js works fine but running browserify and then node output.js gives me the fs is not defined error. Also output now looks like this:

(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){

/* Test 2 */

var template_path = './templates/test.html';
var temp = fs.readFileSync(template_path, 'utf8');
console.log(temp);

},{}]},{},[1]);

[brunops]

It seems that the transform for fs.readFileSync() only works when a string is the first parameter.

Following code doesn’t work

var fs = require('fs');
var filename = '/tmp/hey.txt';

var text = fs.readFileSync(filename, 'utf8');

But this works

var fs = require('fs');

var text = fs.readFileSync('/tmp/hey.txt', 'utf8');

[Prashant-Kan]

Hello Guys, I am facing a similar problem I have imported “fs” using import * as fs from “fs” and trying to execute fs.readFile() and fs.readFileSync with there respective arguments. But, getting an error as “fs” object doesn’t have a function readFile() and readFileSync(). I have tried using var fsFile = require(“fs”);.

I am using in Cypress automation project in typescript.