JSFiddle - React, Tailwind, and code Playground

JavaScript

/** Convert a string to string with dashes  
example:

ip: "Test"
op: "T-e-s-t"

*/
var input = "Test";
var splitarray = input.split('');
var output=[];
for (var i=0; i<splitarray.length;i++)
{
	output.push(splitarray[i])
  if(i!=splitarray.length-1)
  output.push('-');
}
var a = output.join('');
alert(a)