Pad helper for strings. Input string is processed to output a string with a minimal length. If the parameter strict is set to true, the output string length is equal to the strLen parameter. Example:

pad("deno", 6, { char: "*", side: "left" }) // output : "**deno"
pad("deno", 6, { char: "*", side: "right"}) // output : "deno**"
pad("denosorusrex", 6 {
  char: "*",
  side: "left",
  strict: true,
  strictSide: "right",
  strictChar: "..."
}) // output : "den..."