left.js

import isblank from "./isblank";
import n from "./n";
import { ERRORTYPES as error } from "./error";

export default function left(text, number) {

For blank text value, return empty string.

  if (isblank(text)) {
    return "";
  }

When number is invalid, return original value.

  if (!n(+number)) {
    return text;
  }