How to handle values starting with double quotes in papaparse

[4integration]

Using latest Papaparse to parse large CSV files.
It handles double quotes in the value but not when value starts with double quotes.

Using this code:

const parsePromise = new Promise<void>((resolve, reject) => {
    Papa.parse<Equipment>(fileStream, {
        header: true,
        delimiter: "\t",
        dynamicTyping: true,
        skipEmptyLines: true,
        step: (result) => {
            const rowData = {
                vehicle_id: result.data.vehicle_id,
                schema_id: result.data.schema_id,
                option_id: result.data.option_id,
                record_id: result.data.record_id,
                location: result.data.location,
                data_value: result.data.data_value,
                condition: result.data.condition,
            };
            entities.push(rowData);
            console.log(rowData)
        },
        complete: () => resolve(),
        error: (error) => reject(error),
    });
});

If I have the following csv data:

vehicle_id	schema_id	option_id	record_id	location	data_value	condition
425972620240523	15102	1266	7700	W	"Första hjälpen"- förbandslåda med varningstriangel, 2 varselvästar	
425972620240523	15104	1266	7700	W	W	
425972620240523	15101	1266	7800	INT	S	
425972620240523	15102	1266	7800	INT	medical kit, warning triangle, 2 safety vests	
425972620240523	15104	1266	7800	INT	INT	
425972620240523	15101	1267	7900	W	S	
425972620240523	15102	1267	7900	W	Papperskorg (borttagbar)	

It outputs

{
  vehicle_id: 425972620240523,
  schema_id: 15102,
  option_id: 1266,
  record_id: 7700,
  location: 'W',
  data_value: 'Första hjälpen"- förbandslåda med varningstriangel, 2 varselvästar\t\r\n' +
    '425972620240523\t15104\t1266\t7700\tW\tW\t\r\n' +
    '425972620240523\t15101\t1266\t7800\tINT\tS\t\r\n' +
    '425972620240523\t15102\t1266\t7800\tINT\tmedical kit, warning triangle, 2 safety vests\t\r\n' +
    '425972620240523\t15104\t1266\t7800\tINT\tINT\t\r\n' +
    '425972620240523\t15101\t1267\t7900\tW\tS\t\r\n' +
    '425972620240523\t15102\t1267\t7900\tW\tPapperskorg (borttagbar)\t\r\n',
  condition: undefined
}

If I move the first double quote as in:

vehicle_id	schema_id	option_id	record_id	location	data_value	condition
425972620240523	15102	1266	7700	W	Första "hjälpen"- förbandslåda med varningstriangel, 2 varselvästar	
425972620240523	15104	1266	7700	W	W	
425972620240523	15101	1266	7800	INT	S	
425972620240523	15102	1266	7800	INT	medical kit, warning triangle, 2 safety vests	
425972620240523	15104	1266	7800	INT	INT	
425972620240523	15101	1267	7900	W	S	
425972620240523	15102	1267	7900	W	Papperskorg (borttagbar)	

The result is correct:

{
  vehicle_id: 425972620240523,
  schema_id: 15102,
  option_id: 1266,
  record_id: 7700,
  location: 'W',
  data_value: 'Första "hjälpen"- förbandslåda med varningstriangel, 2 varselvästar',
  condition: null
}
{
  vehicle_id: 425972620240523,
  schema_id: 15104,
  option_id: 1266,
  record_id: 7700,
  location: 'W',
  data_value: 'W',
  condition: null
}
....

How can Papaparse handle values starting with a double quote?

[janisdd]

Hardly known, there is a setting "quoteChar". The default value is ".
It is normally used to encode fields that contain the separator (here tabulator).

So papaparse thinks that "Första hjälpen" is actually the whole field (because it starts and ends with the quoteChar) and gives an error.

Let m be your data

let m = `...`
Papa.parse(m, { delimiter: '\t', quoteChar: '#' }

Tested on https://www.papaparse.com/demo today