Add characters to a string in Javascript

Question

let text = "";
for(let member in list) {
  text += list[member];
}

You can also keep adding strings to an existing string like so:

var myString = "Hello ";
myString += "World";
myString += "!";

the result would be -> Hello World!

simply used the + operator. Javascript concats strings with +

To use String.concat, you need to replace your existing text, since the function does not act by reference.

let text = "";
for (const member in list) {
  text = text.concat(list[member]);
}

Of course, the join() or += suggestions offered by others will work fine as well.

It sounds like you want to use join, e.g.:

var text = list.join();

Simple use text = text + string2