addon sdk update simple-prefs value

Question

Is it possible to programmatically set a simple-prefs value?
Or should I be using preferences/service which contains set(name, value)?

This is the simple-prefs I would like to set:

{
    "name": "pathToFile",
    "title": "Path to file?",
    "type": "directory",
    "value": ""
},

Answer 1

White it isn't obvious from the documentation, but simple-prefs.prefs is actually a Branch, which in turn is a full Javascript proxy around the underlying XPCOM preference service.

So it is possible to just set any preference to a Number (Integer), Boolean or String, e.g.

const {prefs} = require("simple-prefs");
console.log("before", prefs.pref1, prefs["pref2"]); 
prefs.pref1 = "some string";
prefs["pref2"] = 2;
console.log("after", prefs.pref1, prefs["pref2"]);