Is it possible to write data to file using only JavaScript?

Question

I want to Write Data to existing file using JavaScript. I don\'t want to print it on console. I want to Actually Write data to abc.txt. I read many answered que

Answer 1

Try

let a = document.createElement('a');
a.href = "data:application/octet-stream,"+encodeURIComponent("My DATA");
a.download = 'abc.txt';
a.click();

If you want to download binary data look here

Update

2020.06.14 I upgrade Chrome to 83.0 and above SO snippet stop works (reason: sandbox security restrictions) - but JSFiddle version works - here