如何将 append 数据写入 javascript 中的 txt？

Question

I'm writing a program, which needs to take some JSON from text file, then modify it and put it back to the same file, something like overwriting. I don't have problem with reading from file and modifying data, but I was searching long and found nothing about writing into files. If it's important - it's server-side file.

Ex. text file: {"name":"John","age":20}
Result which I need: {"name":"John","age":21}

Answer 1

You can use the fs module in node to write to a file!

information is located here on it https://www.w3schools.com/nodejs/nodejs_filesystem.asp

The two methods you will want to look at is .writeFile or .appendFile depending on your specific need.