How to record data correctly?

Question

JSON

How to write data correctly
I write
fs.appendFile('./data.txt', JSON.stringify(data));
And so several times, as a result I have several arrays in the date file,
then I want to get them
data = JSON.parse (result)
as a result I get

}, {
  "update": "11:09"
}][{
  "update": "Сегодня, 21:45"
}, {

an error (this is with jsonlint) that I don’t have enough commas between arrays (which is logical)
Therefore, I get an
unexpected token
error , everything is logical, but I don’t understand how to fix it
How can I write an array separated by a comma, or how can I parse invalid JSON

Answer 1

Like a crutch, but in most cases it will work: You can also do this:
data = JSON.parse(result.replace(/\]\[/g,'],['));
data = JSON.parse(result.split('][').join('],['));

Answer 2

appendFile()suitable for simple text files, such as logs.
In the case of JSON, you need:

1. Read file content
   
2. Parse it to JSON
   
3. Make the necessary changes (add elements)
   
4. Save modified JSON to a file by completely overwriting the file
   

If you do not want to do this manually, you need to look towards databases.