The UTF-8 encoded string in Node.js displays a mysterious black question mark

I am facing an issue with a CSV file that I receive from my supplier. They have encoded a string using UTF-8, resulting in black question marks appearing. Despite several attempts, I am unable to convert it back successfully.

var common              = require('./common/index.js');
var fs = require('fs');
var Iconv  = require('iconv').Iconv;
var encoding  = require('encoding');
var iconv = new Iconv('UTF-8', 'ISO-8859-1');
var detectCharacterEncoding = require('detect-character-encoding');
common.fileHandler(
    'default.csv',
    function(dataSet) {
        var fileBuffer = fs.readFileSync('file.txt');
        var charsetMatch = detectCharacterEncoding(fileBuffer);
        console.log(charsetMatch);
        console.log(encoding.convert(dataSet[0].description, 'UTF-8', 'ISO-8859-1'))
    }
)

The code snippet above returns:

{ encoding: 'UTF-8', confidence: 100 }
<Buffer c3 bd 20 53 79 6e 63 20 64 61 74 61 20 61 6e 64 20 66 61 73 74 20 63 68 61 72 67 69 6e 67 3c 62 72 2f 3e c3 bd 20 50 72 65 6d 69 75 6d 20 61 6c 75 6d 69 ...>

I would greatly appreciate any assistance provided regarding this matter.

Answer №1

When you find yourself without the original file before conversion and have exhausted all options, there is still a solution to replace question marks with proper utf8 characters :)

Simply copy the question mark and paste it into your code (copy in your editor)

someContent.replace('paste_question_mark_here','ą');

This method serves as a last resort if you lose your encoding data during the conversion process.

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